[jdk21u-dev] RFR: 8330647: Two CDS tests fail with -UseCompressedOops and UseSerialGC/UseParallelGC

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle.

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Commit messages:
 - Backport c2cca2ab443ff87f689810b747985adfdbfbe54a

Changes: https://git.openjdk.org/jdk21u-dev/pull/1381/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1381&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330647
  Stats: 30 lines in 1 file changed: 27 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1381.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1381/head:pull/1381

PR: https://git.openjdk.org/jdk21u-dev/pull/1381