[jdk21] RFR: 8310194: Generational ZGC: Lock-order asserts in JVMTI IterateThroughHeap

[Stefan Karlsson]

8310194: Generational ZGC: Lock-order asserts in JVMTI IterateThroughHeap

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Commit messages:
 - Backport 4e4e586dac3f4be15a6488a6b72aa9e2cd5d43db

Changes: https://git.openjdk.org/jdk21/pull/69/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=69&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310194
  Stats: 203 lines in 5 files changed: 103 ins; 37 del; 63 mod
  Patch: https://git.openjdk.org/jdk21/pull/69.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/69/head:pull/69

PR: https://git.openjdk.org/jdk21/pull/69