RFR: CODETOOLS-7903559: JMH: Update testing pipelines for JDK 21 release

[Aleksey Shipilev]

JDK 21 is released, we should start testing with it, and also with JDK 22-ea.

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Commit messages:
 - Fix

Changes: https://git.openjdk.org/jmh/pull/120/files
 Webrev: https://webrevs.openjdk.org/?repo=jmh&pr=120&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903559
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jmh/pull/120.diff
  Fetch: git fetch https://git.openjdk.org/jmh.git pull/120/head:pull/120

PR: https://git.openjdk.org/jmh/pull/120