RFR: Merge jdk19

[Jesper Wilhelmsson]

Forwardport JDK 19 -> JDK 20

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Commit messages:
 - Merge remote-tracking branch 'jdk19/master' into Merge_jdk19
 - 8245268: -Xcomp is missing from java launcher documentation
 - 8288703: GetThreadState returns 0 for virtual thread that has terminated
 - 8288854: getLocalGraphicsEnvironment() on for multi-screen setups throws exception NPE
 - 8280320: C2: Loop opts are missing during OSR compilation
 - 8289570: SegmentAllocator:allocateUtf8String(String str) default behavior mismatch to spec
 - 8289585: ProblemList sun/tools/jhsdb/JStackStressTest.java on linux-aarch64
 - 8289549: ISO 4217 Amendment 172 Update
 - 8284358: Unreachable loop is not removed from C2 IR, leading to a broken graph

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.org/?repo=jdk&pr=9354&range=00.0
 - jdk19: https://webrevs.openjdk.org/?repo=jdk&pr=9354&range=00.1

Changes: https://git.openjdk.org/jdk/pull/9354/files
  Stats: 382 lines in 14 files changed: 330 ins; 5 del; 47 mod
  Patch: https://git.openjdk.org/jdk/pull/9354.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9354/head:pull/9354

PR: https://git.openjdk.org/jdk/pull/9354