RFR: 8365976: G1: Full gc should mark nmethods on stack

[Thomas Schatzl]

Hi all,

  please review this fix that moves the nmethod arming after registering the nmethods during full gc to make sure that the remaining ones are armed. That changed after [JDK-8360540](https://bugs.openjdk.org/browse/JDK-8360540).

Testing: gha

Thanks,
  Thomas

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

Commit messages:
 - 8365976

Changes: https://git.openjdk.org/jdk/pull/26899/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26899&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8365976
  Stats: 3 lines in 2 files changed: 1 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26899.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26899/head:pull/26899

PR: https://git.openjdk.org/jdk/pull/26899