enable test coverage + upload results in workflow

[kim-tsao]

What does this PR do?

Updated the go test command in the Makefile to include test coverage and report generation. The go.yml was also updated to upload the test coverage report as a workflow artifact. There was a minor fix where the originally command was missing the -v flag and so the details of the test cases (PASS/FAIL) were not being reported

What issues does this PR fix or reference?

devfile/api#470

Is your PR tested? Consider putting some instruction how to test your changes

I ran the Makefile locally

[maysunfaisal]

Nice, tried it out and works well 👍

Two questions:

1. should we add the generated html to gitignore
2. how do you access the coverage html file from the workflow tests

[kim-tsao]

Nice, tried it out and works well 👍

Two questions:

1. should we add the generated html to gitignore

Good point, I just updated the file.

2. how do you access the coverage html file from the workflow tests

It'll show up as a downloadable artifact under the summary page

[maysunfaisal]

It'll show up as a downloadable artifact under the summary page

pretty cool

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kim-tsao, maysunfaisal

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