[jdk21u-dev] RFR: 8332880: JFR GCHelper class recognizes "Archive" regions as valid

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle.

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Commit messages:
 - Backport 2cca83bc82eb6b090ae96b8c072b986b93d9244a

Changes: https://git.openjdk.org/jdk21u-dev/pull/1700/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1700&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332880
  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1700.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1700/head:pull/1700

PR: https://git.openjdk.org/jdk21u-dev/pull/1700