[foreign-memaccess+abi] RFR: 8290880: Add static MemorySegment::mismatch method [v2]

[Maurizio Cimadamore]

> As discussed in [1], it would be useful if the `MemorySegment` class provided a static mismatch method, similarly to what we have provided for `copy`.
> 
> This patch adds that method, and rewrites the existing instance `mismatch` method to be based on that new static method.
> It then adds new tests to cover the new static method.
> 
> [1] - https://mail.openjdk.org/pipermail/panama-dev/2022-June/017099.html

Maurizio Cimadamore has updated the pull request incrementally with one additional commit since the last revision:

  Update static mismatch signature to match Arrays.mismatch
  Update tests
  Update javadoc

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

Changes:
  - all: https://git.openjdk.org/panama-foreign/pull/691/files
  - new: https://git.openjdk.org/panama-foreign/pull/691/files/3daebadc..03dc60e2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=panama-foreign&pr=691&range=01
 - incr: https://webrevs.openjdk.org/?repo=panama-foreign&pr=691&range=00-01

  Stats: 86 lines in 3 files changed: 39 ins; 9 del; 38 mod
  Patch: https://git.openjdk.org/panama-foreign/pull/691.diff
  Fetch: git fetch https://git.openjdk.org/panama-foreign pull/691/head:pull/691

PR: https://git.openjdk.org/panama-foreign/pull/691