RFR: 8352536: Add overloads to parse and build class files from/to MemorySegment [v4]

[David M. Lloyd]

> Provide method overloads to the ClassFile interface of the java.lang.classfile API which allow parsing of classes found in memory segments, as well as allowing built class files to be output to them.

David M. Lloyd has updated the pull request incrementally with one additional commit since the last revision:

  Remove some missed dead code, update copyrights

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24139/files
  - new: https://git.openjdk.org/jdk/pull/24139/files/68ab1ac9..8aa98039

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24139&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24139&range=02-03

  Stats: 52 lines in 3 files changed: 0 ins; 47 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/24139.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24139/head:pull/24139

PR: https://git.openjdk.org/jdk/pull/24139