RFR: Merge jdk20

[Jesper Wilhelmsson]

Forwardport JDK 20 -> JDK 21

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Commit messages:
 - Merge
 - 8298797: Specification of some restricted methods is incorrect
 - 8287699: jdk/jfr/api/consumer/TestRecordingFileWrite.java fails with exception: java.lang.Exception: Found event that should not be there.
 - 8297979: ZGC: Ensure consistent MemoryUsage from MemoryMXBean.getHeapMemoryUsage()
 - 8298083: The "CheckBox/RadioButton[Enabled/Disabled].textForeground" stoped working
 - 8298888: ProblemList gc/g1/TestVerifyGCType.java on linux and macosx
 - 7093322: (fs spec) Files.newBufferedWriter should be clear when coding errors are detected
 - 8298050: Add links to graph output for javadoc
 - 8298376: ZGC: thaws stackChunk with stale oops
 - 8298727: Trees.getPath may crash for unnamed package
 - ... and 1 more: https://git.openjdk.org/jdk/compare/ac2fcf3f...f069db65

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.org/?repo=jdk&pr=11710&range=00.0
 - jdk20: https://webrevs.openjdk.org/?repo=jdk&pr=11710&range=00.1

Changes: https://git.openjdk.org/jdk/pull/11710/files
  Stats: 250 lines in 15 files changed: 180 ins; 52 del; 18 mod
  Patch: https://git.openjdk.org/jdk/pull/11710.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11710/head:pull/11710

PR: https://git.openjdk.org/jdk/pull/11710