[jdk21] RFR: 8309498: [JVMCI] race in CallSiteTargetValue recording

[Tobias Hartmann]

Backport of [JDK-8309498](https://bugs.openjdk.java.net/browse/JDK-8309498). Applies cleanly.

Thanks,
Tobias

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Commit messages:
 - 8309498: [JVMCI] race in CallSiteTargetValue recording

Changes: https://git.openjdk.org/jdk21/pull/50/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=50&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309498
  Stats: 11 lines in 1 file changed: 5 ins; 3 del; 3 mod
  Patch: https://git.openjdk.org/jdk21/pull/50.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/50/head:pull/50

PR: https://git.openjdk.org/jdk21/pull/50