RFR: 8286103: VThreadMonitorTest fails "assert(!current->cont_fastpath() || (current->cont_fastpath_thread_state() && !interpreted_native_or_deoptimized_on_stack(current))) failed"

[Ron Pressler]

Please review the following fix.

Detection of a deoptimized frame in thaw was incorrect, as it tested the deoptimization state of a frame object constructed without relevant data. 

Passes loom tiers 1-5.

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Commit messages:
 - Comment typo
 - Add comment
 - Fix detection of deoptimized frame in thaw

Changes: https://git.openjdk.org/jdk19/pull/18/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk19&pr=18&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8286103
  Stats: 6 lines in 1 file changed: 5 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk19/pull/18.diff
  Fetch: git fetch https://git.openjdk.org/jdk19 pull/18/head:pull/18

PR: https://git.openjdk.org/jdk19/pull/18