RFR: Merge openjdk/jdk:master [v6]

[William Kemper]

> Merges tag jdk-22+26

William Kemper has updated the pull request incrementally with two additional commits since the last revision:

 - Revert "Use API for version of jtreg used to build jdk21"
   
   This reverts commit 4cbbf23918a2297bed0008906c5342f47aab0de7.
 - Use API for version of jtreg used to build jdk21

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Changes:
  - all: https://git.openjdk.org/shenandoah/pull/363/files
  - new: https://git.openjdk.org/shenandoah/pull/363/files/99df412f..e65e8f9e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=shenandoah&pr=363&range=05
 - incr: https://webrevs.openjdk.org/?repo=shenandoah&pr=363&range=04-05

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/shenandoah/pull/363.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/363/head:pull/363

PR: https://git.openjdk.org/shenandoah/pull/363