RFR: 8311508: ZGC: RAII use of IntelJccErratumAlignment

Tue Aug 8 13:55:34 UTC 2023

Fixed the locations where unnamed IntelJccErratumAlignment circumvented the correctness asserts.
Also strengthened the asserts so that a IntelJccErratumAlignment RAII object scope must surround at least some instruction. 

Tested GHA and tier1,tier2

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Commit messages:
 - 8311508: ZGC: RAII use of IntelJccErratumAlignment

Changes: https://git.openjdk.org/jdk/pull/15191/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15191&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8311508
  Stats: 6 lines in 3 files changed: 3 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/15191.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15191/head:pull/15191

PR: https://git.openjdk.org/jdk/pull/15191