RFR: 8352069: Renamings after JEP 522: G1 GC: Improve Throughput by Reducing Synchronization

[Thomas Schatzl]

Hi all,

  please review this change that implements some deferred cleanups from JEP 522.

Just some renaming for all platform-specific files.

Testing: gha

Thanks,
  Thomas

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Commit messages:
 - 8352069

Changes: https://git.openjdk.org/jdk/pull/27450/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27450&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352069
  Stats: 66 lines in 6 files changed: 0 ins; 0 del; 66 mod
  Patch: https://git.openjdk.org/jdk/pull/27450.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27450/head:pull/27450

PR: https://git.openjdk.org/jdk/pull/27450