[jdk17] RFR: 8266518: Refactor and expand scatter/gather tests [v2]

[Paul Sandoz]

> Refactor scatter/gather tests to be included in the load/store test classes and expand to support access between `ShortVector` and and `char[]`, and access between `ByteVector` and `boolean[]`.
> 
> Vector tests pass on linux-x64 linux-aarch64 macosx-x64, and windows-x64.

Paul Sandoz has updated the pull request incrementally with one additional commit since the last revision:

  Remove redundatem data providers.

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Changes:
  - all: https://git.openjdk.java.net/jdk17/pull/48/files
  - new: https://git.openjdk.java.net/jdk17/pull/48/files/6455ae43..2dbb5dee

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk17&pr=48&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk17&pr=48&range=00-01

  Stats: 144 lines in 6 files changed: 0 ins; 120 del; 24 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/48.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/48/head:pull/48

PR: https://git.openjdk.java.net/jdk17/pull/48