[jdk21u-dev] RFR: 8314824: Fix serviceability/jvmti/8036666/GetObjectLockCount.java to use vm flags

[Goetz Lindenmaier]

I backport this for parity with 21.0.4-oracle.

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Commit messages:
 - Backport 93e82c01460a70f214653a558d53c1c6180ae0d3

Changes: https://git.openjdk.org/jdk21u-dev/pull/321/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=321&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314824
  Stats: 6 lines in 1 file changed: 3 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/321.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/321/head:pull/321

PR: https://git.openjdk.org/jdk21u-dev/pull/321