[jdk21u-dev] RFR: 8323552: AbstractMemorySegmentImpl#mismatch returns -1 when comparing distinct areas of the same instance of MemorySegment

[Per Minborg]

Hi all,

This pull request contains a backport of commit [93579c29](https://github.com/openjdk/jdk/commit/93579c29e3ba60a8bc16d712e7ffc733f324a223) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Per Minborg on 25 Mar 2024 and was reviewed by Maurizio Cimadamore.

Thanks!

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Commit messages:
 - Backport 93579c29e3ba60a8bc16d712e7ffc733f324a223

Changes: https://git.openjdk.org/jdk21u-dev/pull/404/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=404&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8323552
  Stats: 35 lines in 2 files changed: 27 ins; 4 del; 4 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/404.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/404/head:pull/404

PR: https://git.openjdk.org/jdk21u-dev/pull/404