Add Kotlin coroutines instrumentation tests

[sharvath-newrelic]

Overview

Per this PR, classloading issues resulting from the porting of Kotlin lab code have been resolved. Additionally, unit tests for the Kotlin coroutines instrumentation modules (1.4, 1.7 and 1.9) have been added with assertions to verify NR agent behavior. Tests help to verify:

• Transaction completion counts
• Transaction name presence
• Metric generation for instrumented operations
• Token propagation across async boundaries

It's worth noting async.kt and PauseService.kt were not ported for the following reasons:

1. async.kt:
   - Contained example code demonstrating async/await patterns but without assertions
   - All patterns have been incorporated into CoroutinesTest.kt with Introspector-based verification
   - The new tests cover the same scenarios (async, awaitAll, multiple deferreds) with agent behavior validation
2. PauseService.kt:
   - No longer needed as new tests use delay() directly within test methods

Related Github Issue

Resolves #2675
Resolves #2661

Testing

To run the instrumentation tests manually, run the following command template via the terminal:
./gradlew instrumentation:kotlin-coroutines-1.x:test --parallel

[codecov-commenter]

Codecov Report

❌ Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.31%. Comparing base (cfb7b44) to head (e2107d7).
⚠️ Report is 131 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/agent/introspec/internal/WeavingClassLoader.java	0.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2705      +/-   ##
============================================
- Coverage     70.34%   70.31%   -0.03%     
+ Complexity    10123    10119       -4     
============================================
  Files           853      853              
  Lines         41118    41120       +2     
  Branches       6240     6241       +1     
============================================
- Hits          28923    28915       -8     
- Misses         9372     9375       +3     
- Partials       2823     2830       +7     

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[sharvath-newrelic]

@dhilpipre This PR does some work to strengthen the Kotlin coroutines test suite. I was curious if you might have any commentary/recommendations for additions or revisions that could be made per this PR?

[dhilpipre]

@sharvath-newrelic I'll take a look and let you know.