RFR: 8338428: Print final VM flags for task

[Leonid Mesnik]

Some VM flags might depend on the environment and it makes sense to log final flags so it is possible to get their value when investigating failures.

I added them to VMProps, so it is always dump final flags before running tests using "-XX:+PrintFlagsFinal".

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Commit messages:
 - updated VMProps

Changes: https://git.openjdk.org/jdk/pull/23054/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23054&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338428
  Stats: 33 lines in 2 files changed: 31 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/23054.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23054/head:pull/23054

PR: https://git.openjdk.org/jdk/pull/23054