[jdk17u-dev] RFR: 8293547: Add relaxed add_and_fetch for macos aarch64 atomics

[Aleksey Shipilev]

Clean backport to improve Atomics performance for the code that opts-in to relaxed CASes.

Additional testing:
 - [x] macos-server-aarch64-fastdebug, `gtest:Atomic` passes
 - [ ]  macos-server-aarch64-fastdebug, `tier1`

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Commit messages:
 - Backport 7a1cb64bc1b85b3ef1b0ba2d84dbc5b8b05c60ff

Changes: https://git.openjdk.org/jdk17u-dev/pull/2097/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2097&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293547
  Stats: 7 lines in 1 file changed: 4 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2097.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2097/head:pull/2097

PR: https://git.openjdk.org/jdk17u-dev/pull/2097