Integrated: Merge lworld

[Vicente Romero]

Merge lworld into universal-tvars

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Commit messages:
 - Merge branch 'lworld' into universal-tvars_merge_lworld_last
 - 8288186: [lw4] Many runtime/cds/appcds/ tests are still referring to IdentityObject
 - 8283777: [lworld] TestArrayCopyAsLoadsStores.java triggers assert after merging jdk-19+15
 - 8288171: [lw4] Revert JDK-8253873 to fix failures in jdi, jvmti and jwdp tests
 - 8288098: [lworld] C2 fails to scalarize value class arguments
 - 8287763: [lw4] Javac does not implement the spec for non-trivial constructors in toto
 - 8288084: [lw4] Tier1 hotspot runtime test ClassHierarchyTest.java fails
 - 8287898: [lw4] test/hotspot/jtreg/runtime/valhalla/inlinetypes/verifier/VerifierInlineTypes.java fails
 - 8287767: [lw4] Javac tolerates mutually incompatible super types.
 - 8287770: [lw4] Javac tolerates synchronizing on an instance of a value interface
 - ... and 13 more: https://git.openjdk.org/valhalla/compare/4e3d1e06...f661394b

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - universal-tvars: https://webrevs.openjdk.java.net/?repo=valhalla&pr=713&range=00.0
 - lworld: https://webrevs.openjdk.java.net/?repo=valhalla&pr=713&range=00.1

Changes: https://git.openjdk.org/valhalla/pull/713/files
  Stats: 9535 lines in 300 files changed: 5759 ins; 2405 del; 1371 mod
  Patch: https://git.openjdk.org/valhalla/pull/713.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/713/head:pull/713

PR: https://git.openjdk.org/valhalla/pull/713