[foreign-memaccess+abi] RFR: 8296417: Make memory session a pure lifetime abstraction [v4]

[Maurizio Cimadamore]

> Add description

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

  Address review comments

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Changes:
  - all: https://git.openjdk.org/panama-foreign/pull/750/files
  - new: https://git.openjdk.org/panama-foreign/pull/750/files/9f390bff..a7801096

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=panama-foreign&pr=750&range=03
 - incr: https://webrevs.openjdk.org/?repo=panama-foreign&pr=750&range=02-03

  Stats: 76 lines in 8 files changed: 60 ins; 1 del; 15 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