[vectorIntrinsics] RFR: 8264153: Add Insert integer nodes implementation for Arm SVE

[Wang Huang]

Add Insert integer nodes implementation for Arm SVE, such like VectorInsert(B/S/I/L) Node.
* add `sve_index` & `sve_cpy`

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Commit messages:
 - 8264153: Add Insert integer nodes implementation for Arm SVE

Changes: https://git.openjdk.java.net/panama-vector/pull/54/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=54&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8264153
  Stats: 254 lines in 5 files changed: 190 ins; 2 del; 62 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/54.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/54/head:pull/54

PR: https://git.openjdk.java.net/panama-vector/pull/54