Kotlin missing type information

[Laurens-W]

What's changed?

Added a test for missing Kotlin Gradle DSL

What's your motivation?

Running into missing type info with Kotlin projects

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[timtebeek]

The K2 upgrade just merged in PR #6766 — it brings significantly improved type attribution (e.g., generic method invocation types now resolve to concrete types like kotlin.String instead of Generic{E}). Worth rebasing on main to check if the type information gaps this test captures are now resolved by K2.