[jdk21u-dev] RFR: 8335007: Inline OopMapCache table

[Aleksey Shipilev]

Almost clean backport to improve `OopMapCache` footprint and performance.

The conflict is in copyright header years, bots still think this is clean.

Additionally, this is one of few backports that gets `OopMapCache` behavior similar to mainline. This makes [JDK-8335409](https://bugs.openjdk.org/browse/JDK-8335409) backport easier, because it avoids lots of conflicts, resolving which might introduce surprising bugs. Aligning this code with mainline makes accidents less likely.

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

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Commit messages:
 - Backport 50dd962b0d0fe36634d96dbbd9d94fbc34d9ff7f

Changes: https://git.openjdk.org/jdk21u-dev/pull/936/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=936&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8335007
  Stats: 17 lines in 2 files changed: 0 ins; 5 del; 12 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/936.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/936/head:pull/936

PR: https://git.openjdk.org/jdk21u-dev/pull/936