[jdk21u-dev] RFR: 8288936: Wrong lock ordering writing G1HeapRegionTypeChange JFR event

[Goetz Lindenmaier]

I backport this for parity with 21.0.4-oracle.

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Commit messages:
 - Backport 0eb0997ae4f81314b764241e69dae5c698dbb6c6

Changes: https://git.openjdk.org/jdk21u-dev/pull/437/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=437&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288936
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/437.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/437/head:pull/437

PR: https://git.openjdk.org/jdk21u-dev/pull/437