Support for Java/Jakarta WebSocket ServerEndpoint

[tobiasstadler]

What does this PR do?

Adds support for Java/Jakarta WebSocket ServerEndpoint

Checklist

• This is a new plugin
  • I have updated CHANGELOG.asciidoc
  • My code follows the style guidelines of this project
  • I have made corresponding changes to the documentation
  • I have added tests that prove my fix is effective or that my feature works
  • New and existing unit tests pass locally with my changes
  • I have updated supported-technologies.asciidoc
  • Added an API method or config option? Document in which version this will be introduced
  • Added an instrumentation plugin? Describe how you made sure that old, non-supported versions are not instrumented by accident.

[github-actions]

👋 @tobiasstadler Thanks a lot for your contribution!

It may take some time before we review a PR, so even if you don’t see activity for some time, it does not mean that we have forgotten about it.

Every once in a while we go through a process of prioritization, after which we are focussing on the tasks that were planned for the upcoming milestone. The prioritization status is typically reflected through the PR labels. It could be pending triage, a candidate for a future milestone, or have a target milestone set to it.

[ghost]

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Build stats

• Reason: null

• Start Time: 2022-01-28T14:44:08.270+0000

• Duration: 52 min 13 sec

• Commit: eaab4dd

Test stats 🧪

Test	Results
Failed	0
Passed	2468
Skipped	16
Total	2484

💚 Flaky test report

Tests succeeded.

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[tobiasstadler]

@felixbarny Could you please review this PR also?

[felixbarny]

run elasticsearch-ci/docs

[felixbarny]

run elasticsearch-ci/docs

[felixbarny]

run elasticsearch-ci/docs

[tobiasstadler]

run elasticsearch-ci/docs

[felixbarny]

run elasticsearch-ci/docs

[tobiasstadler]

Thank You!

[felixbarny]

Thank you too!