[vectorIntrinsics+mask] RFR: Merge panama-vector:vectorIntrinsics [v2]

[Xiaohong Gong]

> Merge with panama-vector:vectorIntrinsics. Tested tier1 and Vector API tests on both x86 and aarch64.

Xiaohong Gong has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:

 - Merge panama-vector:vectorIntrinsics
 - 8266621: Add masking support for unary/ternary vector intrinsics
   
   Reviewed-by: psandoz, vlivanov
 - 8264563: Add masked vector intrinsics for binary/store operations
   
   Co-authored-by: Ningsheng Jian <njian at openjdk.org>
   Reviewed-by: jbhateja, sviswanathan, vlivanov, whuang
 - 8265109: SVE predicate register allocation support for vectorIntrinsics
   
   Reviewed-by: sviswanathan
 - Merge panama-vector:vectorIntrinsics

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Changes: https://git.openjdk.java.net/panama-vector/pull/89/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=89&range=01
  Stats: 3808 lines in 68 files changed: 2698 ins; 471 del; 639 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/89.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/89/head:pull/89

PR: https://git.openjdk.java.net/panama-vector/pull/89