[jdk17u-dev] RFR: 8295657: SA: Allow larger object alignments

[Aleksey Shipilev]

Improves SA support for larger alignments. 

Needs a follow-up backport to fix x86_32.

Additional testing:
 - [x] New test fails without a fix, passes with the fix
 - [x] Linux x86_64 fastdebug `serviceability/sa`

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Commit messages:
 - Backport dfd2d83144fe4d78a7144acda6d9cb3e0045ea70

Changes: https://git.openjdk.org/jdk17u-dev/pull/1457/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1457&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295657
  Stats: 105 lines in 2 files changed: 99 ins; 4 del; 2 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1457.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1457/head:pull/1457

PR: https://git.openjdk.org/jdk17u-dev/pull/1457