RFR: 8312498: Thread::getState and JVM TI GetThreadState should return TIMED_WAITING virtual thread is timed parked [v4]

[Alan Bateman]

> Thread::getState is an API for monitoring and management purposes to report the thread state. If a virtual thread is parked with LockSupport.parkNanos, its state is reported as  WAITING when it should be TIMED_WAITING. JVM TI GetThreadState has the same issue in that it returns JVMTI_THREAD_STATE_WAITING_INDEFINITELY instead of the JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT bit set. Not a very visible issue with debuggers because JDWP maps both states to "WAIT" but it may be noticed by tools using other JVM TI agents.
> 
> The change is straight-forward with additional state for timed-parking/parked/pinned. The existing virtual/ThreadAPI.java test is expanded to this scenario. A new test is added for JVM TI GetThreadState to test waiting/timed-waited cases (including pinned) as test coverage seems patchy here.

Alan Bateman has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 17 additional commits since the last revision:

 - Merge
 - Reorder getState tests, use assertEquals and misc. cleanup
 - Merge
 - Merge
 - Revert back to explicit TIMED_xxx states
 - Merge
 - Merge
 - Merge
 - Remove unecessary RF from test
 - Merge
 - ... and 7 more: https://git.openjdk.org/jdk/compare/5a10d32c...ac8da3e5

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14978/files
  - new: https://git.openjdk.org/jdk/pull/14978/files/70b7766d..ac8da3e5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14978&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14978&range=02-03

  Stats: 43518 lines in 857 files changed: 8140 ins; 4569 del; 30809 mod
  Patch: https://git.openjdk.org/jdk/pull/14978.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14978/head:pull/14978

PR: https://git.openjdk.org/jdk/pull/14978