[foreign-memaccess+abi] RFR: 8296417: Make memory session a pure lifetime abstraction [v5]

[Maurizio Cimadamore]

> Add description

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

  Unseal Arena

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

Changes:
  - all: https://git.openjdk.org/panama-foreign/pull/750/files
  - new: https://git.openjdk.org/panama-foreign/pull/750/files/a7801096..3183bfcb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=panama-foreign&pr=750&range=04
 - incr: https://webrevs.openjdk.org/?repo=panama-foreign&pr=750&range=03-04

  Stats: 87 lines in 2 files changed: 16 ins; 59 del; 12 mod
  Patch: https://git.openjdk.org/panama-foreign/pull/750.diff
  Fetch: git fetch https://git.openjdk.org/panama-foreign pull/750/head:pull/750

PR: https://git.openjdk.org/panama-foreign/pull/750