Add rewrite support for RemoveUnusedImports

[Pankraz76]

enabler for:

• PoC: Add rewrite support for errorprone.refasterrules #20219

PoC: Add rewrite support for errorprone.refasterrules.FileRulesRecipes

trying to automate efforts like:

• MINOR: Cleanups in coordinator-common/group-coordinator #20097

refs:

• Introduce Rewrite & PMD covering S1144: Unused "private" methods should be removed opensearch-project/OpenSearch#18791
• PoC: Add rewrite support for errorprone.refasterrules diffplug/spotless#2576
• MINOR: Cleanup Trogdor Module #20214
• https://error-prone.picnic.tech/refasterrules/StringRules/
• PoC: Add rewrite support for errorprone.refasterrules #20219
• Issue #17487: Introduce Rewrite covering S1144: Unused "private" methods should be removed checkstyle/checkstyle#17545

[Pankraz76]

> Task :rewriteDryRun
No recipes were activated. Activate a recipe with rewrite.activeRecipe("com.fully.qualified.RecipeClassName") in your build file, or on the command line with -DactiveRecipe=com.fully.qualified.RecipeClassName
Applying recipes would make no changes. No report generated.

[Incubating] Problems report is available at: file:///Users/vincent.potucek/IdeaProjects/kafka/build/reports/problems/problems-report.html

Deprecated Gradle features were used in this build, making it incompatible with Gradle 9.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

For more on this, please refer to https://docs.gradle.org/8.14.1/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.

BUILD SUCCESSFUL in 5s
133 actionable tasks: 5 executed, 128 up-to-date
10:19:14: Execution finished 'rewriteDryRun'.

[Pankraz76]

kindly request some feedback on enabler

@m1a2st
@sjhajharia
@ravikalla
@apoorvmittal10
@CalvinConfluent
@chia7712
@frankvicky

[github-actions]

A label of 'needs-attention' was automatically added to this PR in order to raise the
attention of the committers. Once this issue has been triaged, the triage label
should be removed to prevent this automation from happening again.

[github-actions]

A label of 'needs-attention' was automatically added to this PR in order to raise the
attention of the committers. Once this issue has been triaged, the triage label
should be removed to prevent this automation from happening again.

[Pankraz76]

i can confirm no one cares about the code quality at all, facing the masses of unused declaration and flaws around. Good luck.