RFR: 8302312: Make ParGCRareEvent_lock G1 specific [v2]

[Thomas Schatzl]

> Hi all,
> 
> please have a look at this renaming of ParGCRareEvent_lock to G1RareEvent_lock to align with it only being used in G1. Previously it had been used with CMS too, but that one's gone now.
> 
> Testing: local compilation, gha
> 
> Based on PR#12511
> 
> Thanks,
> Thomas

Thomas Schatzl has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/12531/files
  - new: https://git.openjdk.org/jdk/pull/12531/files/0631598e..0631598e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12531&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12531&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/12531.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12531/head:pull/12531

PR: https://git.openjdk.org/jdk/pull/12531