[JAVA][KOTLIN][SPRING] upgrade dependencies

[martin-mfg]

Upgrading a bunch of dependencies in generated code.

There are a lot more dependencies that should be upgraded. But upgrading everything takes more time than I have. And I don't want to leave my changes unmerged for too long.
I tried to test every upgraded dependency version in at least one generated sample.
I mostly upgraded dependencies in maven pom files. Because in many cases the corresponding gradle and sbt files had much older versions of swagger dependencies, and I didn't have the time to test the upgraded dependencies for compatibility with these old swagger dependencies. So I didn't change the gradle & sbt files in these cases.
I also removed a few unused dependencies and sample files.
jersey 3.1.3 is available already, but IntelliJ reports security problems in 3.1.3 and 3.1.2, so I upgraded to 3.1.1 instead.

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 
  ./bin/generate-samples.sh ./bin/configs/*.yaml
  ./bin/utils/export_docs_generators.sh
  

  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*.
  For Windows users, please run the script in Git BASH.
• File the PR against the correct branch: master (upcoming 7.1.0 minor release - breaking changes with fallbacks), 8.0.x (breaking changes without fallbacks)
• If your PR is targeting a particular programming language, @mention the technical committee members, so they are more likely to review the pull request.
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