[jdk21u-dev] RFR: 8329692: Add more details to FrameStateTest.java test instructions

[Goetz Lindenmaier]

I backport this for parity with 21.0.7-oracle

-------------

Commit messages:
 - Backport 6f98d8f58f98827ae454c7ce4839de4071d95767

Changes: https://git.openjdk.org/jdk21u-dev/pull/1373/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1373&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329692
  Stats: 50 lines in 1 file changed: 7 ins; 13 del; 30 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1373.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1373/head:pull/1373

PR: https://git.openjdk.org/jdk21u-dev/pull/1373