[jdk19] RFR: 8287809: Revisit implementation of memory session [v6]

[Maurizio Cimadamore]

> This is a JDK 19 clone of: https://github.com/openjdk/jdk/pull/9017

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

  Turn non-closeable view back into MemorySession impl

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

Changes:
  - all: https://git.openjdk.org/jdk19/pull/22/files
  - new: https://git.openjdk.org/jdk19/pull/22/files/09bb7cf3..809a0a2e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk19&pr=22&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk19&pr=22&range=04-05

  Stats: 79 lines in 14 files changed: 7 ins; 11 del; 61 mod
  Patch: https://git.openjdk.org/jdk19/pull/22.diff
  Fetch: git fetch https://git.openjdk.org/jdk19 pull/22/head:pull/22

PR: https://git.openjdk.org/jdk19/pull/22