[jdk18u] RFR: 8281638: jfr/event/allocation tests fail with release VMs after JDK-8281318 due to lack of -XX:+UnlockDiagnosticVMOptions [v2]

[Aleksey Shipilev]

> Follow-up for JDK-8281318 backport.
> 
> Additional testing: 
>  - [x] Linux x86_32 fastdebug, affected tests pass
>  - [x] Linux x86_32 release, affected tests pass

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.java.net/jdk18u/pull/43/files
  - new: https://git.openjdk.java.net/jdk18u/pull/43/files/4d9c60ca..4d9c60ca

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=43&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=43&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/43.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/43/head:pull/43

PR: https://git.openjdk.java.net/jdk18u/pull/43