RFR: 8309562: [JVMCI] Export symbols used by VirtualThread notifyJvmti intrinsics to JVMCI compilers.

[Yudi Zheng]

This PR allows JVMCI compiler to implement VirtualThread notifyJvmti intrinsics.

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Commit messages:
 - Export various virtual thread JVMTI fields to JVMCI compiler.

Changes: https://git.openjdk.org/jdk/pull/14348/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14348&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309562
  Stats: 10 lines in 1 file changed: 10 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/14348.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14348/head:pull/14348

PR: https://git.openjdk.org/jdk/pull/14348