[jdk17u-dev] RFR: 8288497: add support for JavaThread::is_oop_safe()

[Aleksey Shipilev]

Clean backport on the way to fix [JDK-8288139](https://bugs.openjdk.org/browse/JDK-8288139). Requires follow-ups as dependent PRs.

Additional testing:
 - [ ] Linux x86_64 fastdebug `tier1` (as part of whole batch of PRs)
 - [ ] Linux x86_64 fastdebug `tier2` (as part of whole batch of PRs)
 - [ ] Linux x86_64 fastdebug `tier3` (as part of whole batch of PRs)

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

Commit messages:
 - Backport e26d3b3c01a06f250344d0afdaa9fadd1fdae33b

Changes: https://git.openjdk.org/jdk17u-dev/pull/1514/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1514&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288497
  Stats: 36 lines in 4 files changed: 24 ins; 5 del; 7 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1514.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1514/head:pull/1514

PR: https://git.openjdk.org/jdk17u-dev/pull/1514