[jdk21u] RFR: Merge jdk21:master [v2]

[Rob McKenna]

> Merge jdk21 into jdk21u

Rob McKenna has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge
 - 8310171: Bump version numbers for 21.0.1
   
   Reviewed-by: iris, erikj

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

Changes:
  - all: https://git.openjdk.org/jdk21u/pull/3/files
  - new: https://git.openjdk.org/jdk21u/pull/3/files/5c631b3a..5c631b3a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u&pr=3&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u&pr=3&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u/pull/3.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/3/head:pull/3

PR: https://git.openjdk.org/jdk21u/pull/3