[jdk21u-dev] RFR: 8331714: Make OopMapCache installation lock-free

[Aleksey Shipilev]

Clean backport to improve internal locking. Also makes future backports clean.

Additional testing:
 - [ ] Linux x86_64 fastdebug `all`

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Commit messages:
 - Backport a2584a8341b2dc9c102abd373a890b2108d3f57e

Changes: https://git.openjdk.org/jdk21u-dev/pull/608/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=608&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331714
  Stats: 12 lines in 3 files changed: 1 ins; 3 del; 8 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/608.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/608/head:pull/608

PR: https://git.openjdk.org/jdk21u-dev/pull/608