Favor parameterized routes for resource name.

[purple4reina]

What does this PR do?

Set the resource name to the parameterized route key when using api gateway v2.

Motivation

A metric is created from each span made by the tracers. The metric name comes from the operation name. The resource name gets added as a tag. Therefore unbound values for resource name can cause a large increase in the number of metrics on an account.

Testing Guidelines

To test this, I created two apps and pulled the event payloads for each to use in the unit tests.

functions:
  v1:
    handler: handler.handler
    events:
      - http:
          method: get
          path: /user/{id}
  v2:
    handler: handler.handler
    events:
      - httpApi:
          method: get
          path: /user/{id}

Additional Notes

This feature already worked for api gatewawy v1.

Types of Changes

• [x] Bug fix
• [ ] New feature
• [ ] Breaking change
• [ ] Misc (docs, refactoring, dependency upgrade, etc.)

Check all that apply

• [ ] This PR's description is comprehensive
• [ ] This PR contains breaking changes that are documented in the description
• [ ] This PR introduces new APIs or parameters that are documented and unlikely to change in the foreseeable future
• [ ] This PR impacts documentation, and it has been updated (or a ticket has been logged)
• [ ] This PR's changes are covered by the automated tests
• [ ] This PR collects user input/sensitive content into Datadog
• [ ] This PR passes the integration tests (ask a Datadog member to run the tests)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 81.67939% with 24 lines in your changes are missing coverage. Please review.

Project coverage is 81.86%. Comparing base (5d49414) to head (93be85b). Report is 12 commits behind head on main.

:exclamation: Current head 93be85b differs from pull request most recent head 5c1c24d. Consider uploading reports for the commit 5c1c24d to get more accurate results

Files	Patch %	Lines
src/index.ts	60.00%	6 Missing :warning:
src/metrics/extension.ts	70.58%	5 Missing :warning:
src/trace/context/extractors/sqs.ts	61.53%	3 Missing and 2 partials :warning:
src/trace/span-inferrer.ts	75.00%	1 Missing and 1 partial :warning:
src/trace/xray-service.ts	92.85%	2 Missing :warning:
src/utils/log.ts	60.00%	2 Missing :warning:
src/metrics/listener.ts	94.73%	0 Missing and 1 partial :warning:
src/trace/patch-http.ts	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #513 +/- ## ========================================== - Coverage 82.10% 81.86% -0.25% ========================================== Files 54 55 +1 Lines 2191 2255 +64 Branches 511 521 +10 ========================================== + Hits 1799 1846 +47 - Misses 329 344 +15 - Partials 63 65 +2 ```

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