Merge Feature/kotlin-source-sets into develop

[ambushwork]

What does this PR do?

Merge Feature/kotlin-source-sets into develop

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 72.00000% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.06%. Comparing base (f7c59b1) to head (dbaea7f).
⚠️ Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
...atadog/gradle/plugin/kcp/DatadogPluginRegistrar.kt	60.00%	12 Missing and 2 partials ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop     #421      +/-   ##
=============================================
- Coverage      77.12%   76.06%   -1.06%     
+ Complexity       347      280      -67     
=============================================
  Files             42       35       -7     
  Lines           1377     1057     -320     
  Branches         168      129      -39     
=============================================
- Hits            1062      804     -258     
+ Misses           220      194      -26     
+ Partials          95       59      -36     

Files with missing lines	Coverage Δ
...lin/com/datadog/gradle/plugin/kcp/KotlinVersion.kt	100.00% <100.00%> (ø)
...atadog/gradle/plugin/kcp/DatadogPluginRegistrar.kt	67.39% <60.00%> (-13.56%)	⬇️

... and 8 files with indirect coverage changes

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