[vectorIntrinsics] RFR: Add reinterpret nodes implementation for Arm SVE

[Wang Huang]

Add reinterpret nodes implementation for Arm SVE. We also adjust the implementation of Matcher::min_vector_size in the same patch.

-------------

Commit messages:
 - Add reinterpret nodes implementation for Arm SVE

Changes: https://git.openjdk.java.net/panama-vector/pull/29/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=29&range=00
  Stats: 90 lines in 3 files changed: 84 ins; 2 del; 4 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/29.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/29/head:pull/29

PR: https://git.openjdk.java.net/panama-vector/pull/29