[lworld] RFR: Merge jdk

[David Simms]

Merge tag 'jdk-20+20' into lworld_merge_jdk_20_20

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

Commit messages:
 - ZObjArrayAllocator::initialize from 8294900 used default prototype markWord
 - Merge tag 'jdk-20+20' into lworld_merge_jdk_20_20
 - 8294467: Fix sequence-point warnings in Hotspot
 - 8294468: Fix char-subscripts warnings in Hotspot
 - 8295662: jdk/incubator/vector tests fail "assert(VM_Version::supports_avx512vlbw()) failed"
 - 8295668: validate-source failure after JDK-8290011
 - 8295372: CompactNumberFormat handling of number one with decimal part
 - 8295456: (ch) sun.nio.ch.Util::checkBufferPositionAligned gives misleading/incorrect error
 - 8290011: IGV: Remove dead code and cleanup
 - 8290368: Introduce LDAP and RMI protocol-specific object factory filters to JNDI implementation
 - ... and 190 more: https://git.openjdk.org/valhalla/compare/3aa9d593...453a7b45

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld: https://webrevs.openjdk.org/?repo=valhalla&pr=800&range=00.0
 - jdk: https://webrevs.openjdk.org/?repo=valhalla&pr=800&range=00.1

Changes: https://git.openjdk.org/valhalla/pull/800/files
  Stats: 31259 lines in 1203 files changed: 18280 ins; 8098 del; 4881 mod
  Patch: https://git.openjdk.org/valhalla/pull/800.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/800/head:pull/800

PR: https://git.openjdk.org/valhalla/pull/800