[vectorIntrinsics+mask] RFR: 8272479: Java API and IR changes for masked rearrange operation [v2]

[Jatin Bhateja]

> - Re-organized the Java API implementation to use one common entry point of masked/non-masked vector compare operation.
>  - Intrinsic side changes to absorb newly passed mask if target support predicated instructions else handled appropriately by blending full vector rearrange vector with broadcasted ZERO vector.

Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:

  8272479: Review comments resolution.

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Changes:
  - all: https://git.openjdk.java.net/panama-vector/pull/110/files
  - new: https://git.openjdk.java.net/panama-vector/pull/110/files/997de9f2..eb5c5761

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=110&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=110&range=00-01

  Stats: 57 lines in 1 file changed: 24 ins; 18 del; 15 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/110.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/110/head:pull/110

PR: https://git.openjdk.java.net/panama-vector/pull/110