RFR: 8329997: Add provisions for checking memory segment alignment constraints [v5]

[Per Minborg]

> This PR proposes to add a new method `MemorySegment::maxByteAlignment` that returns the maximum byte alignment of a segment (both heap and native segments).
> 
> Clients can then use this method to determine if a segment is properly aligned for any given layout (e.g. following a `MemorySegment::reinterpret` operation).

Per Minborg has updated the pull request incrementally with one additional commit since the last revision:

  Update JavaDoc

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18779/files
  - new: https://git.openjdk.org/jdk/pull/18779/files/eaf6832e..e971e7f6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18779&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18779&range=03-04

  Stats: 8 lines in 1 file changed: 0 ins; 5 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/18779.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18779/head:pull/18779

PR: https://git.openjdk.org/jdk/pull/18779