[jdk21u] RFR: 8319897: Move StackWatermark handling out of LockStack::contains

[Aleksey Shipilev]

Clean backport to improve Lightweight Locking reliability. The patch only affects the LW paths, which are disabled by default.

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Commit messages:
 - Backport bbf52e0e4cb76b4c6425e7d1266dcdbb4df556ea

Changes: https://git.openjdk.org/jdk21u/pull/420/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=420&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319897
  Stats: 17 lines in 2 files changed: 7 ins; 6 del; 4 mod
  Patch: https://git.openjdk.org/jdk21u/pull/420.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/420/head:pull/420

PR: https://git.openjdk.org/jdk21u/pull/420