feat(hapi): Skip update HTTP's span name and update RpcMetadata's route instead

[chigia001]

Which problem is this PR solving?

Each framework has a different approach to updating Span's name and HTTP_ROUTE attribute. We want to delegate this to instrumentation-http for consistent's name and attribute
This PR fixes the above issue for hapi

• This will partially fix issue Setting HTTP_ROUTE inconsistent accross HTTP server frameworks #1381

Short description of the changes

• Skip modifying HTTP's Span name directly in instrumentation-hapi code
• Update route property of RpcMetadata

[codecov]

Codecov Report

Merging #1570 (ebdd120) into main (ad94c5c) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1570      +/-   ##
==========================================
- Coverage   91.80%   91.79%   -0.01%     
==========================================
  Files         139      139              
  Lines        7124     7119       -5     
  Branches     1432     1432              
==========================================
- Hits         6540     6535       -5     
  Misses        584      584              

Files Changed	Coverage Δ
...de/opentelemetry-instrumentation-hapi/src/utils.ts	100.00% <ø> (ø)
...emetry-instrumentation-hapi/src/instrumentation.ts	99.30% <100.00%> (-0.01%)	⬇️

[chigia001]

can we merge this or add pkg:instrumentation-hapi label so we can test tav for this?

[Flarna]

Hapi instrumentation has unfortunately no active maintainer.
Could someone from @open-telemetry/javascript-maintainers please take a look. I think this PR looks good (like the similar ones before).