[jdk17u-dev] RFR: 8277216: Examine InstanceKlass::_misc_flags for concurrency issues

[Aleksey Shipilev]

Clean backport to improve JVM reliability.

Additional testing:
 - [ ] Inspecting affected code paths
 - [ ] Linux x86_64 fastdebug `tier1 tier2 tier3`

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

Commit messages:
 - Backport 3607a5cdd9a3013851c8faefd346f04934f897e6

Changes: https://git.openjdk.org/jdk17u-dev/pull/1469/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1469&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8277216
  Stats: 32 lines in 2 files changed: 10 ins; 17 del; 5 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1469.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1469/head:pull/1469

PR: https://git.openjdk.org/jdk17u-dev/pull/1469