[jdk21u] RFR: 8316181: Move the fast locking implementation out of the .ad files

[Aleksey Shipilev]

Clean backport to provide the ground for subsequent backports in this area.

Additional testing:
 - [x] macos-aarch64-server-fastdebug, `jdk_loom hotspot_loom`
 - [ ] linux-aarch64-server-fastdebug, `tier1 tier2 tier3`

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Commit messages:
 - Backport b48dbf6bfa652ef031c35f0a85a409142563aa72

Changes: https://git.openjdk.org/jdk21u/pull/254/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=254&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316181
  Stats: 848 lines in 6 files changed: 431 ins; 413 del; 4 mod
  Patch: https://git.openjdk.org/jdk21u/pull/254.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/254/head:pull/254

PR: https://git.openjdk.org/jdk21u/pull/254