[lworld] RFR: 8298659: [lworld] ValueObject isSubstutiable comparison of float/double should use raw bits [v3]

[Roger Riggs]

> Correct substitutability comparison of float and double using the raw-bits as indicated in JEP 401.

Roger Riggs has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains six additional commits since the last revision:

 - Remove unused imports
 - Merge branch 'lworld' into 8298659-substitutable-raw-float-bits
 - Merge branch '8298659-substitutable-raw-float-bits' of https://github.com/RogerRiggs/valhalla into 8298659-substitutable-raw-float-bits
 - Update src/java.base/share/classes/java/lang/runtime/ValueObjectMethods.java
   
   Co-authored-by: Mandy Chung <mandy.chung at oracle.com>
 - Merge branch 'valhalla-extra-open' into 8298659-substitutable-raw-float-bits
 - 8298659: [lworld] ValueObject isSubstutitable comparison of float/double should use raw bits
   
   Create a separate cache of method pointers for substitutablity test for primitives in ValueObjectMethods.

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Changes:
  - all: https://git.openjdk.org/valhalla/pull/1039/files
  - new: https://git.openjdk.org/valhalla/pull/1039/files/f4a3d82c..00e74f5d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=1039&range=02
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=1039&range=01-02

  Stats: 1158 lines in 158 files changed: 362 ins; 312 del; 484 mod
  Patch: https://git.openjdk.org/valhalla/pull/1039.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1039/head:pull/1039

PR: https://git.openjdk.org/valhalla/pull/1039