feat(instrumentation-pg): implementation of metric operation duration

[maryliag]

Which problem is this PR solving?

• Part Of Prototype for Semantic Conventions for Database Metrics #2348

Short description of the changes

• This PR implements part of the Semantic Conventions for Database Metrics. I will break down the implementation on different PRs to facilitate the review process.
• This PR focus on the metrics:
  • db.client.operation.duration

This PR does not contain all attributes, because all the ones that require parsing of the query will be more complex and need dedicated testing for performance and be opt-in, so I will leave those for the next PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.77%. Comparing base (dfb2dff) to head (fa0b0fd).
Report is 245 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2380      +/-   ##
==========================================
- Coverage   90.97%   90.77%   -0.21%     
==========================================
  Files         146      156      +10     
  Lines        7492     7716     +224     
  Branches     1502     1584      +82     
==========================================
+ Hits         6816     7004     +188     
- Misses        676      712      +36     

Files with missing lines	Coverage Δ
...elemetry-instrumentation-pg/src/instrumentation.ts	89.65% <100.00%> (+1.68%)	⬆️
...node/opentelemetry-instrumentation-pg/src/utils.ts	97.63% <100.00%> (+0.66%)	⬆️

... and 74 files with indirect coverage changes

[david-luna]

@maryliag thanks for your contribution :)

PR looks very good. I left one question I'm curious about before giving approval.

[JacksonWeber]

LGTM

[maryliag]

@pichlermarc friendly ping if this can be merged

[pichlermarc]

Failing tests are unrelated, looks like some issue with the runners - I'll merge this in once they work again 🙂

[pichlermarc]

Failing tests are actually caused by #2445 - I'm not sure how to fix that yet. 😞
Edit: #2446 should fix it 🙂

[pichlermarc]

The test failures now seem related to the previous PR #2349 which seems to have introduced some flakiness in the tests.

I've re-started, but it's something that we need to address.