RFR: 8377845: Restore regtest for JDK-8324881 with DiagnoseSyncOnValueBasedClasses=2 [v2]

[Alex Menkov]

> Testcase for JDK-8324881 was mistakenly removed by JDK-8359437 instead of removing only -XX:LockingMode argument.
> The fix restores the test case.
> 
> Testing: updated test on all platforms

Alex Menkov has updated the pull request incrementally with one additional commit since the last revision:

  indent

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Changes:
  - all: https://git.openjdk.org/jdk/pull/29722/files
  - new: https://git.openjdk.org/jdk/pull/29722/files/16daa74b..a772a0cb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29722&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29722&range=00-01

  Stats: 8 lines in 1 file changed: 0 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/29722.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29722/head:pull/29722

PR: https://git.openjdk.org/jdk/pull/29722