RFR: Merge openjdk/jdk:master

[William Kemper]

Merges tag jdk-22+21

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Commit messages:
 - 8317510: Change Windows debug symbol files naming to avoid losing info when an executable and a library share the same name
 - 8318613: ChoiceFormat patterns are not well tested
 - 8318186: ChoiceFormat inconsistency between applyPattern() and setChoices()
 - 8318487: Specification of the ListFormat.equals() method can be improved
 - 8317360: Missing null checks in JfrCheckpointManager and JfrStringPool initialization routines
 - 8318735: RISC-V: Enable related hotspot tests run on riscv
 - 8318727: Enable parallelism in vmTestbase/vm/gc/concurrent tests
 - 8318607: Enable parallelism in vmTestbase/nsk/stress/jni tests
 - 8318608: Enable parallelism in vmTestbase/nsk/stress/threads tests
 - 8312980: C2: "malformed control flow" created during incremental inlining
 - ... and 241 more: https://git.openjdk.org/shenandoah/compare/fb4098ff...d96f38b8

The webrev contains the conflicts with master:
 - merge conflicts: https://webrevs.openjdk.org/?repo=shenandoah&pr=349&range=00.conflicts

Changes: https://git.openjdk.org/shenandoah/pull/349/files
  Stats: 31003 lines in 1082 files changed: 19698 ins; 6224 del; 5081 mod
  Patch: https://git.openjdk.org/shenandoah/pull/349.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/349/head:pull/349

PR: https://git.openjdk.org/shenandoah/pull/349