RFR: 8310459: [BACKOUT] 8304450: [vectorapi] Refactor VectorShuffle implementation

[Jatin Bhateja]

Backing out shuffle related overhaul done with [JDK-8304450](https://bugs.openjdk.org/browse/JDK-8304450), we saw significant performance degradation with VectorAPI JMH and our internal benchmarks. Following two issues were filed on this recently.

1/ [JDK-8310459](https://bugs.openjdk.org/browse/JDK-8310459): We observed significant performance drop in VectorAPI slice / unslice performance w.r.t to JDK-20.
2/ [JDK-8309373](https://bugs.openjdk.org/browse/JDK-8309373): Performance drop in Vector-API based kernel with JDK-21.

A follow-up JBS [JDK-8310691](https://bugs.openjdk.org/browse/JDK-8310691) is created to address this in JDK-22.

Best Regards,
Jatin

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Commit messages:
 - 8310459: [BACKOUT] 8304450: [vectorapi] Refactor VectorShuffle implementation

Changes: https://git.openjdk.org/jdk/pull/14629/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14629&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310459
  Stats: 3895 lines in 64 files changed: 1169 ins; 1819 del; 907 mod
  Patch: https://git.openjdk.org/jdk/pull/14629.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14629/head:pull/14629

PR: https://git.openjdk.org/jdk/pull/14629