Add support for Kotlin 2.2.0; drop Kotlin 1.5.x

[smowton]

• Adds support for Kotlin 2.2.0-Beta1
• Drops support for Kotlin 1.5.x
• Trivial fix to the Gradle build of the Kotlin extractor
• Accepts test changes relating to Kotlin 2.0.0 -> 2.1.20
  • These are mostly trivial source-location changes, except:
  • The comment extractor is performing better presumably due to improvements in the underlying representation
  • *=, /= and %= operations are once again extracted correctly; presumably their origin information has been fixed
  • Reference to a static final Java field can lead to more constant propagation than before
• Sets unit tests to execute against latest stable (2.1.20).

I have also evaluated this against 2.2.0-Beta1 and see only trivial changes (loss of source-locations for some synthetic elements) which I hope will be fixed for the 2.2.0 release.

[Copilot]

Pull Request Overview

This pull request adds support for Kotlin 2.2.0 by introducing new Beta1 modules and updating existing utility functions to work with the new API patterns. Key changes include:

• Addition of new files in the v_2_2_0-Beta1 folder exposing updated functionality (e.g., getJvmDefaultMode, createImplicitParameterDeclarationWithWrappedDescriptor).
• Updates in legacy versions (v_1_9_0-Beta and v_1_5_0) to ensure consistency in receiver handling and parameter indexing.
• Adjustments in the KotlinFileExtractor and comment extraction logic to correctly process dispatch versus extension receivers.

Reviewed Changes

Copilot reviewed 24 out of 30 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
java/kotlin-extractor/src/main/kotlin/utils/versions/v_2_2_0-Beta1/*	New functions leveraging Kotlin 2.2.0 APIs
java/kotlin-extractor/src/main/kotlin/utils/versions/v_1_9_0-Beta/CommentExtractorLighterAST.kt	Updated to use the new IrVisitorVoid type alias
java/kotlin-extractor/src/main/kotlin/utils/versions/v_1_5_0/*	Adjusted functions for parameter indexing and default mode extraction
java/kotlin-extractor/src/main/kotlin/utils/IrVisitorLookup.kt	Updated to depend on the new IrVisitor alias
java/kotlin-extractor/src/main/kotlin/comments/CommentExtractor.kt	Modified receiver filtering to combine dispatch and extension receivers
java/kotlin-extractor/src/main/kotlin/KotlinUsesExtractor.kt java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt	Replaced older API usages with new functions to support Kotlin 2.2.0

Files not reviewed (6)

• MODULE.bazel: Language not supported
• docs/codeql/reusables/supported-versions-compilers.rst: Language not supported
• java/kotlin-extractor/build.gradle: Language not supported
• java/kotlin-extractor/deps/kotlin-compiler-2.2.0-Beta1.jar: Language not supported
• java/kotlin-extractor/deps/kotlin-compiler-embeddable-2.2.0-Beta1.jar: Language not supported
• java/kotlin-extractor/deps/kotlin-stdlib-2.2.0-Beta1.jar: Language not supported

Comments suppressed due to low confidence (2)

java/kotlin-extractor/src/main/kotlin/utils/versions/v_1_9_0-Beta/CommentExtractorLighterAST.kt:45

• Verify that subclassing via 'IrVisitorVoid()' correctly implements all required methods compared to the previous 'IrElementVisitorVoid' interface to avoid potential mismatches in visitor behavior.

            object : IrVisitorVoid() {

java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt:6011

• Confirm that restricting the check to only dispatch receivers (using isDispatchReceiver) is the intended behavior here, considering the CommentExtractor separately handles extension receivers.

                    if (owner is IrValueParameter && isDispatchReceiver(owner)) {