RFR: 8369442: ExitOnOutOfMemoryError should exit more gracefully

[Aleksey Shipilev]

See RFE for more discussion. It seems we have a leeway in defining what "exit" means for `-XX:+ExitOnOutOfMemoryError`, and this PR does it more akin to `JVM_Halt`, rather than abrupt `os::_exit`. This gives VM a chance to shutdown some of its subsystems gracefully.

Comments welcome!

Additional testing:
 - [x] Linux x86_64 server fastdebug, `tier1`
 - [ ] Linux x86_64 server fastdebug, `all`

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Commit messages:
 - Fix

Changes: https://git.openjdk.org/jdk/pull/27718/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27718&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8369442
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/27718.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27718/head:pull/27718

PR: https://git.openjdk.org/jdk/pull/27718