[jdk21u-dev] RFR: 8319932: [JVMCI] class unloading related tests can fail on libgraal

[Goetz Lindenmaier]

I backport this for parity with 21.0.9-oracle.

Resolved Copyright.

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Commit messages:
 - backport 7d53559d2f8f3c27f4d764f081fb031f7660c50b

Changes: https://git.openjdk.org/jdk21u-dev/pull/1986/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1986&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319932
  Stats: 44 lines in 2 files changed: 40 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1986.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1986/head:pull/1986

PR: https://git.openjdk.org/jdk21u-dev/pull/1986