Added HTTP method+path to JavaDocs in kotlin clients

[ranger-ross]

This PR is a QoL improvement that adds the HTTP method and path to the Javadoc for each operation in Kotlin clients.
The motivation it to make it more obvious which methods map to the HTTP endpoint.

The changes are fairly trival and I broke out each client into a separate commit to making reviewing easier.

Also I recently open a similar PR for the Rust clients for reference: #20591

PR checklist

• Read the contribution guidelines.
• Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
• Run the following to build the project and update samples:

  ./mvnw clean package || exit
  ./bin/generate-samples.sh ./bin/configs/*.yaml || exit
  ./bin/utils/export_docs_generators.sh || exit
  

  (For Windows users, please run the script in Git BASH)
  Commit all changed files.
  This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master.
  These must match the expectations made by your contribution.
  You may regenerate an individual generator by passing the relevant config(s) as an argument to the script, for example ./bin/generate-samples.sh bin/configs/java*.
  IMPORTANT: Do NOT purge/delete any folders/files (e.g. tests) when regenerating the samples as manually written tests may be removed.
• File the PR against the correct branch: master (upcoming 7.x.0 minor release - breaking changes with fallbacks), 8.0.x (breaking changes without fallbacks)
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cc: @dr4ke616 @karismann @Zomzog @andrewemery @4brunu @yutaka0m @stefankoppier @e5l

[maksim-kosolapov]

@ranger-ross There is an issue with these PR changes. When the path ends with /* it appears like a nested commend in KDoc and the generated API file is broken. It would be great to get this fixed ASAP.

cc: @wing328

[ranger-ross]

Oh sorry. I didn't know the Kotlin parser interpreters /* as a comment when already instead of a JavaDoc. 😅

[ranger-ross]

I think I have a bug fix. I'll open a PR soon