[vectorIntrinsics] RFR: 8258072: Add Reinterpret nodes implementation for Arm SVE

[Wang Huang]

Add reduction nodes support for Arm SVE. Add the backend codegen for node like "VectorReinterpret" .
In this patch, We implement these instructs: 
*  reinterpret (src == dst)
*  reinterpretExpand (src < dst)
*  reinterpretShrink (src > dst)
At the same time, we fix a bug (JDK-8258989) because it is not merged in panama-vector/vectorIntrinsics.

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Commit messages:
 - 8258072: Add Reinterpret nodes implementation for Arm SVE

Changes: https://git.openjdk.java.net/panama-vector/pull/30/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=30&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258072
  Stats: 150 lines in 3 files changed: 147 ins; 2 del; 1 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/30.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/30/head:pull/30

PR: https://git.openjdk.java.net/panama-vector/pull/30