upgrade jruby to 9.4.12.0

[jsvd]

Important issues addressed:

• Fixed an issue where Mutex lock acquisition may leave the Mutex locked if an asynchronous Thread interrupt happens at the same time. #8585, #8586
• Fixed a memory leak where singleton classes would leave behind bookkeeping objects that accumulated over time. #8591, #8598

Depedency upgrades:

• rubygems been updated to version 3.6.3 to fix an incompatibility with bundler 2.6. #8590, #8596
• bundler has been updated to version 2.6.3. #8596
• jruby-openssl has been updated to 0.15.3. #8458, Release 0.15.3
• jar-dependencies has been updated to 0.5.4 to fix remaining issues loading Maven jars in containerized environments. #8593, #8595

Exhaustive test suite run: https://buildkite.com/elastic/logstash-exhaustive-tests-pipeline/builds/1237

closes #17007

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[elasticmachine]

💔 Build Failed

• Buildkite Build
• Commit: f13ffe6

Failed CI Steps

• 🥼 Integration Tests / part 2
• 🥼 Integration Tests / part 2
• 🥼 Integration Tests / part 2
• 🥼 IT Persistent Queues / part 2
• 🥼 IT Persistent Queues / part 2
• 🥼 IT Persistent Queues / part 2
• 🥼 IT Persistent Queues / part 2

History

• 💔 Build #2312 failed e57c601
• 💔 Build #2194 failed ad296de
• 💛 Build #2187 was flaky 6fb7e60
• 💚 Build #2186 succeeded 26a4be6
• 💔 Build #2177 failed 304d7ff

[mergify]

This pull request does not have a backport label. Could you fix it @jsvd? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit.
• backport-8.x is the label to automatically backport to the 8.x branch.

[mergify]

backport-8.x has been added to help with the transition to the new branch 8.x.
If you don't need it please use backport-skip label.

[mergify]

This pull request is now in conflicts. Could you fix it @jsvd? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b bump_jruby_9_4_11_0 upstream/bump_jruby_9_4_11_0
git merge upstream/main
git push upstream bump_jruby_9_4_11_0

[donoghuc]

I'm taking this over in #17696 . Looks like we got 9.4.12.1 since this began. Going to go ahead and close this one for now. Thanks!