wip: cleanup(userspace/libsinsp,test,build): drop container manager

[FedeDP]

What type of PR is this?

/kind cleanup

Any specific area of the project related to this PR?

/area build
/area CI
/area libsinsp
/area tests

What this PR does / why we need it:

Following falcosecurity/falco#3403, this PR does multiple things:

• drops all container related code
• drops all container related tests
• drops grpc,curl,openssl and cares deps that are not needed anymore
• drops MINIMAL_BUILD whose only purpose was to disable gvisor; we already have a flag for that: BUILD_LIBSCAP_GVISOR
• Allows e2e tests (not libsinsp_e2e ones) to run by downloading the plugin, since they test spawning containers

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Opening this just to let other people know about the cleanup; also, this will be wip until all TODOs below are done.

TODO:

• reimplement ifinfo.cpp sinsp_network_interfaces::is_ipv4addr_in_local_machine(): /~https://github.com/falcosecurity/libs/blob/master/userspace/libsinsp/ifinfo.cpp#L326
• reimplement sinsp_filtercheck_user.cpp sinsp_filter_check_user::extract_single : /~https://github.com/falcosecurity/libs/blob/master/userspace/libsinsp/sinsp_filtercheck_user.cpp#L93
• move m_program_hash and m_program_hash_scripts as foreign key filled in by the container plugin and drop compute_program_hash. OR, use a RAII object just like we did for users/groups (chore(userspace/libsinsp): move user group manager on container_id changed refresh to a RAII object #2194) -> after a discussion with @jasondellaluce we decided to go the cleanup(userspace/libsinsp): call sinsp_observer methods after an event has been processed by all parsers #2222 route: since sinsp (and Falco) are not using those fields, we offload their implementation to the libs consumers, if needed.
• fix e2e-tests CI

Less important:

• you'll note that the plugin is being downloaded by upstream releases that are only available for x86_64: /~https://github.com/FedeDP/container_plugin/releases. Instead, we will download latest artifacts once we have a proper CI on top of it (ie: once the plugin is donated to the /~https://github.com/falcosecurity/plugins repo) for both architecture. Note arm64 is not used actually because we only run e2e tests on x86_64 for now.

Does this PR introduce a user-facing change?:

cleanup(userspace/libsinsp,test,build): drop container manager
cleanup(build): drop MINIMAL_BUILD

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: FedeDP

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• OWNERS [FedeDP]

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[FedeDP]

cc @falcosecurity/libs-maintainers

[github-actions]

Perf diff from master - unit tests

    11.36%     -1.39%  [.] sinsp::next
     1.42%     -0.87%  [.] std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct<char const*>
     4.08%     +0.68%  [.] gzfile_read
     9.84%     +0.60%  [.] sinsp_parser::reset
     1.92%     +0.55%  [.] scap_event_decode_params
     9.39%     -0.47%  [.] sinsp_evt::get_type
     2.88%     +0.39%  [.] sinsp_thread_manager::get_thread_ref
     3.17%     -0.36%  [.] sinsp_thread_manager::find_thread
     1.29%     +0.33%  [.] libsinsp::sinsp_suppress::process_event
     1.24%     +0.30%  [.] sinsp::fetch_next_event

Heap diff from master - unit tests

peak heap memory consumption: 723.36K
peak RSS (including heaptrack overhead): 0B
total memory leaked: 143.85K

Heap diff from master - scap file

peak heap memory consumption: 278.09K
peak RSS (including heaptrack overhead): 0B
total memory leaked: 145.04K

Benchmarks diff from master

Comparing gbench_data.json to /root/actions-runner/_work/libs/libs/build/gbench_data.json
Benchmark                                                         Time             CPU      Time Old      Time New       CPU Old       CPU New
----------------------------------------------------------------------------------------------------------------------------------------------
BM_sinsp_split_mean                                            -0.0338         -0.0337           153           147           153           147
BM_sinsp_split_median                                          -0.0368         -0.0367           152           147           152           147
BM_sinsp_split_stddev                                          +2.0024         +1.9991             1             2             1             2
BM_sinsp_split_cv                                              +2.1074         +2.1038             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_mean                  +0.0014         +0.0015            61            61            61            61
BM_sinsp_concatenate_paths_relative_path_median                +0.0028         +0.0029            61            61            61            61
BM_sinsp_concatenate_paths_relative_path_stddev                +0.4913         +0.4932             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_cv                    +0.4892         +0.4909             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_mean                     -0.0456         -0.0455            25            24            25            24
BM_sinsp_concatenate_paths_empty_path_median                   -0.0430         -0.0429            25            24            25            24
BM_sinsp_concatenate_paths_empty_path_stddev                   -0.7590         -0.7588             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_cv                       -0.7474         -0.7474             0             0             0             0
BM_sinsp_concatenate_paths_absolute_path_mean                  +0.0336         +0.0337            63            65            63            65
BM_sinsp_concatenate_paths_absolute_path_median                +0.0452         +0.0453            62            65            62            65
BM_sinsp_concatenate_paths_absolute_path_stddev                -0.4140         -0.4137             1             1             1             1
BM_sinsp_concatenate_paths_absolute_path_cv                    -0.4331         -0.4329             0             0             0             0
BM_sinsp_split_container_image_mean                            -0.0284         -0.0284           404           392           403           392
BM_sinsp_split_container_image_median                          -0.0291         -0.0291           404           392           404           392
BM_sinsp_split_container_image_stddev                          -0.3097         -0.3097             2             2             2             2
BM_sinsp_split_container_image_cv                              -0.2895         -0.2895             0             0             0             0

[FedeDP]

/milestone 0.21.0

[codecov]

Codecov Report

Attention: Patch coverage is 30.00000% with 21 lines in your changes missing coverage. Please review.

Project coverage is 76.89%. Comparing base (cb93f4b) to head (b59265c).

Files with missing lines	Patch %	Lines
userspace/libsinsp/examples/test.cpp	0.00%	17 Missing ⚠️
userspace/libsinsp/sinsp_filtercheck_fd.cpp	57.14%	3 Missing ⚠️
userspace/libsinsp/event.cpp	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2207      +/-   ##
==========================================
+ Coverage   75.11%   76.89%   +1.78%     
==========================================
  Files         276      217      -59     
  Lines       34394    30123    -4271     
  Branches     5922     4651    -1271     
==========================================
- Hits        25836    23164    -2672     
+ Misses       8558     6959    -1599     

Flag	Coverage Δ
libsinsp	76.89% <30.00%> (+1.78%)	⬆️

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[FedeDP]

Will rebase on master once #2195 is merged too.

[FedeDP]

Rebased on top of latest master.