#23834 fix(Kotlin): use the global apiNamePrefix and apiNameSuffix settings (#23822)

fixes (#23822)

Removes Kotlin specific apiSuffix additionalSetting.
Adds support for global apiNamePrefix and apiNameSuffix settings to the kotlin generator.

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 WSL)
  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)
• If your PR solves a reported issue, reference it using GitHub's linking syntax (e.g., having "fixes #123" present in the PR description)
• If your PR is targeting a particular programming language, @mention the technical committee members, so they are more likely to review the pull request.

Kotlin comittee members:
@karismann (2019/03) @Zomzog (2019/04) @andrewemery (2019/10) @4brunu (2019/11) @yutaka0m (2020/03) @stefankoppier (2022/06) @e5l (2024/10) @dennisameling (2026/02)

---

Summary by cubic

Switch Kotlin API class naming to the global apiNamePrefix and apiNameSuffix settings and remove the Kotlin-only apiSuffix option. Fixes #23822 and aligns Kotlin with other generators.

• Migration
  • Remove apiSuffix from Kotlin configs; it’s no longer supported.
  • Use apiNamePrefix and/or apiNameSuffix instead (e.g., -p apiNameSuffix=Test).
  • No action needed if you didn’t set apiSuffix.