RFR: 8306679: com/sun/jdi/InterruptHangTest.java asserts with -Xcomp -Dmain.wrapper=Virtual options

[Serguei Spitsyn]

The test is failing with virtual threads because the `cur_stack_depth()` of a virtual thread executed in `interp_only` mode is invalidated conditionally in the `ThawBase::thaw_slow()`:
```JVMTI_ONLY(if (!return_barrier) invalidate_jvmti_stack(_thread));```

It has to be invalidated unconditionally instead:
```JVMTI_ONLY(invalidate_jvmti_stack(_thread));```

Testing:
 - ran the test `com/sun/jdi/InterruptHangTest.java` locally and with mach5
 - the mach5 tiers 1-6 all passed

-------------

Commit messages:
 - 8306679: com/sun/jdi/InterruptHangTest.java asserts with -Xcomp -Dmain.wrapper=Virtual options

Changes: https://git.openjdk.org/jdk/pull/20943/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20943&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306679
  Stats: 2 lines in 2 files changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20943.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20943/head:pull/20943

PR: https://git.openjdk.org/jdk/pull/20943