[jdk21u-dev] RFR: 8320586: update manual test/jdk/TEST.groups

[Andrew Lu]

I backport this for parity with 21.0.6-oracle.

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Commit messages:
 - Backport 99b9cb0a2eae1196f2127cd48e4085f19a90c4b4

Changes: https://git.openjdk.org/jdk21u-dev/pull/985/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=985&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320586
  Stats: 10 lines in 1 file changed: 5 ins; 2 del; 3 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/985.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/985/head:pull/985

PR: https://git.openjdk.org/jdk21u-dev/pull/985