RFR: Merge jdk19 [v2]

[Jesper Wilhelmsson]

> Forwardport JDK 19 -> JDK 20

Jesper Wilhelmsson has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 96 additional commits since the last revision:

 - Merge
 - 8287801: Fix test-bugs related to stress flags
   
   Reviewed-by: chagedorn, thartmann
 - 8288663: JFR: Disabling the JfrThreadSampler commits only a partially disabled state
   
   Reviewed-by: jbachorik, egahlin
 - 8287771: Remove useless G1 After GC summary refinement and sampling thread times
   
   Reviewed-by: tschatzl, kbarrett
 - 8288011: StringConcatFactory: Split application of stringifiers
   
   Reviewed-by: jvernee, mchung
 - 8288685: JFR: Use static methods for Active Recording and Active Setting events
   
   Reviewed-by: mgronlun
 - 8288673: Reduce runtime of java.time microbenchmarks
   
   Reviewed-by: jvernee
 - 8288667: Reduce runtime of java.text microbenchmarks
   
   Reviewed-by: jvernee
 - 8284672: Collapse identical catch branches in java.desktop
   
   Reviewed-by: prr, aivanov, serb
 - 8288329: Avoid redundant TreeMap.containsKey call in PolicyParser.read
   
   Reviewed-by: mullan
 - ... and 86 more: https://git.openjdk.org/jdk/compare/cb2201b4...6efc7e9e

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9220/files
  - new: https://git.openjdk.org/jdk/pull/9220/files/6efc7e9e..6efc7e9e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9220&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9220&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/9220.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9220/head:pull/9220

PR: https://git.openjdk.org/jdk/pull/9220