RFR: 8371014: Dump JFR recording on CrashOnOutOfMemoryError is incorrectly implemented

[Markus Grönlund]

Alternative for solving [JDK-8371014](https://bugs.openjdk.org/browse/JDK-8371014)

Also includes a fix for [JDK-8373257](https://bugs.openjdk.org/browse/JDK-8373257)

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Commit messages:
 - reordering
 - update comment
 - is_recording() conditional
 - remove tautology
 - 8371014

Changes: https://git.openjdk.org/jdk/pull/29094/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29094&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8371014
  Stats: 292 lines in 15 files changed: 219 ins; 18 del; 55 mod
  Patch: https://git.openjdk.org/jdk/pull/29094.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29094/head:pull/29094

PR: https://git.openjdk.org/jdk/pull/29094