[jdk19] RFR: 8290071: Javadoc for MemorySegment/MemoryAddress getter/setters contains some typos

[Maurizio Cimadamore]

Some of the accessors in `MemorySegment` and `MemoryAddress` (esp. setters) have typos - e.g. they use `from` instead of `into`.

I've tried to simplify the text and made it more regular.

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Commit messages:
 - Initial push

Changes: https://git.openjdk.org/jdk19/pull/131/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk19&pr=131&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8290071
  Stats: 50 lines in 2 files changed: 0 ins; 0 del; 50 mod
  Patch: https://git.openjdk.org/jdk19/pull/131.diff
  Fetch: git fetch https://git.openjdk.org/jdk19 pull/131/head:pull/131

PR: https://git.openjdk.org/jdk19/pull/131