[jdk17u] RFR: 8261579: AArch64: Support for weaker memory ordering in Atomic

[Aleksey Shipilev]

Clean backport to improve AArch64 performance in selected places.

Addtional testing:
 - [x] Linux AArch64 fastdebug build
 - [ ] Linux AArch64 fastdebug `tier1`
 - [ ] Linux AArch64 fastdebug `tier2`

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Commit messages:
 - Backport a97715755d01b88ad9e4cf32f10ca5a3f2fda898

Changes: https://git.openjdk.java.net/jdk17u/pull/239/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u&pr=239&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261579
  Stats: 117 lines in 6 files changed: 112 ins; 2 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk17u/pull/239.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u pull/239/head:pull/239

PR: https://git.openjdk.java.net/jdk17u/pull/239