Integrated: Merge jdk18

[Jesper Wilhelmsson]

Forwardport JDK 18 -> JDK 19

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Commit messages:
 - Merge
 - 8278185: Custom JRE cannot find non-ASCII named module inside
 - 8278421: G1: Remove unused HeapRegion::verify
 - 8278312: Update SimpleSSLContext keystore to use SANs for localhost IP addresses
 - 8253860: PPC: Relocation::pd_set_data_value conflates compressed oops and klasses
 - 8273146: Start of release updates for JDK 19

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.java.net/jdk/pull/6787/files
  Stats: 4620 lines in 79 files changed: 4523 ins; 39 del; 58 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6787.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6787/head:pull/6787

PR: https://git.openjdk.java.net/jdk/pull/6787