[Meta] Update JRuby to 10 on branch 8.19

[andsel]

This issue shapes a plan of updates to apply to 8.19 branch to switch to JRuby 10.0.x

Phase 1:

Create a test branch to align to the latest JRuby 9.4.x, a significant amount work was done in #17696 and in #17787:

• Backport bump jruby 9.4.13 #19188
• Update 8.19 to jruby 9.4.15 #19204
• Log a deprecation message if JDK 17 use is detected, that JDK 17 support will be dropped in a future release #19236

Phase 2:

• Prevent Logstash from starting by default if JDK17 is detected. #19237 (evaluate backport of require java 21, since jruby 10 requires it #19010 ).

Phase 3

• Migrate JRuby to 10.x. #19303. Original work for 9.4 migration to 10.0.3 is Bump JRuby to 10.x #18755. Include also the fix for SystemExit in fix forced-shutdown (double SIGINT) behaviour for JRuby 10 #19017.
• Run the pipeline logstash-supported-plugins-test-pipeline on this test branch and check for the original report in Fix plugin test failures caused by JRuby 10 upgrade #18872.
• migration to 10.0.6
  • upgrade JRuby to 10.0.4.0 #18856
  • Update jruby to 10.0.5.0 #18965
  • migration 10.0.5 -> 10.0.6 Update jruby to 10.0.6.0 #19264