[lworld] RFR: Merge jdk

[David Simms]

Merge jdk-15+21

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Commit messages:
 - Merge branch 'lworld' into lworld_merge_jdk_15_21
 - Whitespace
 - InstanceKlas _kind test converted from uint32_t to uint8_t
 - Logical merge fixes
 - Merge tag 'jdk-15+21' into lworld_merge_jdk_15_21
 - 8244061: Disable jvmci/graal/aot when building linux-aarch64 at Oracle
 - 8244051: AbsPathsInImage.java still fails on Windows
 - 8243673: Mac signing process should not use --deep arg
 - 8239569: PublicMethodsTest.java failed due to NPE in java.base/java.nio.file.FileSystems.getFileSystem(FileSystems.java:230)
 - 8243933: use driver mode in gc tests
 - ... and 126 more: https://git.openjdk.java.net/valhalla/compare/b0ea2464...e0ebe959

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld: https://webrevs.openjdk.java.net/valhalla/65/webrev.00.0
 - jdk: https://webrevs.openjdk.java.net/valhalla/65/webrev.00.1

Changes: https://git.openjdk.java.net/valhalla/pull/65/files
  Stats: 50398 lines in 1533 files changed: 26018 ins; 21025 del; 3355 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/65.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/65/head:pull/65

PR: https://git.openjdk.java.net/valhalla/pull/65