[lworld] RFR: Merge jdk

[David Simms]

Merge tag 'jdk-18+7'

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Commit messages:
 - Merge remote-tracking branch 'origin/lworld' into lworld_merge_jdk_18_6
 - Reciever type could be null for JDK-8268371 change
 - Biased Lock testing referenced in test config
 - Merge tag 'jdk-18+7' into lworld_merge_jdk_18_6
 - 8271014: Refactor HeapShared::is_archived_object()
 - 8270949: Make dynamically generated classes with the class file version of the current release
 - 8269849: vmTestbase/gc/gctests/PhantomReference/phantom002/TestDescription.java failed with "OutOfMemoryError: Java heap space: failed reallocation of scalar replaced objects"
 - 8270991: G1 Full GC always performs heap verification after JDK-8269295
 - 8270820: remove unused stiFileTableIndex from SDE.c
 - 8270147: Increase stride size allowing unrolling more loops
 - ... and 457 more: https://git.openjdk.java.net/valhalla/compare/233d7bbb...0d817ed7

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld: https://webrevs.openjdk.java.net/?repo=valhalla&pr=509&range=00.0
 - jdk: https://webrevs.openjdk.java.net/?repo=valhalla&pr=509&range=00.1

Changes: https://git.openjdk.java.net/valhalla/pull/509/files
  Stats: 77842 lines in 1519 files changed: 38139 ins; 33036 del; 6667 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/509.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/509/head:pull/509

PR: https://git.openjdk.java.net/valhalla/pull/509