chore(ci): update codeowners and bump timestamp for expired aws-lambda tests [backport 3.3] (#13012)

Backport 08ee25b from #12847 to 3.3.

Title: updates the codeowners to `apm-serverless` and bumps timestamp
for expired aws-lambda tests

## Checklist
- [x] PR author has checked that all the criteria below are met
- The PR description includes an overview of the change
- The PR description articulates the motivation for the change
- The change includes tests OR the PR description describes a testing
strategy
- The PR description notes risks associated with the change, if any
- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
- Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
- Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
- Newly-added code is easy to change
- Release note makes sense to a user of the library
- If necessary, author has acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment
- Backport labels are set in a manner that is consistent with the
[release branch maintenance
policy](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting)

Co-authored-by: Quinna Halim <[email protected]>

Author: github-actions[bot]

.github/CODEOWNERS

@@ -198,3 +198,4 @@ tests/tracer/test_ci.py                            @DataDog/ci-app-libraries
 
 # Serverless
 tests/internal/test_serverless.py   @DataDog/apm-core-python @DataDog/apm-serverless
+tests/contrib/aws_lambda            @DataDog/apm-serverless

tests/contrib/aws_lambda/test_aws_lambda.py

@@ -52,7 +52,7 @@ def setup():
     unpatch()
 
 
-@flaky(1742580778)
+@flaky(1744053478)
 @pytest.mark.parametrize("customApmFlushDeadline", [("-100"), ("10"), ("100"), ("200")])
 @pytest.mark.snapshot
 def test_timeout_traces(context, customApmFlushDeadline):
@@ -135,7 +135,7 @@ async def test_module_patching(mocker, context):
     ],
 )
 @pytest.mark.snapshot
-@flaky(1741838400, reason="Did not receive expected traces: 'aws.lambda' for [handler3-instance_handler_with_code]")
+@flaky(1744053478, reason="Did not receive expected traces: 'aws.lambda' for [handler3-instance_handler_with_code]")
 def test_class_based_handlers(context, handler, function_name):
     env = get_env(
         {