[vectorIntrinsics] RFR: 8284197: AArch64: Add backend implementations for vector reverse bits/bytes

[Eric Liu]

This patch adds the aarch64 backend match rules for vector reverse
bits/bytes for NEON and SVE.

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Commit messages:
 - 8284197: AArch64: Add backend implementations for vector reverse bits/bytes

Changes: https://git.openjdk.java.net/panama-vector/pull/192/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=192&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8284197
  Stats: 317 lines in 10 files changed: 209 ins; 5 del; 103 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/192.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/192/head:pull/192

PR: https://git.openjdk.java.net/panama-vector/pull/192