RFR: 8304265: Implementation of Foreign Function and Memory API (Third Preview) [v19]

[Per Minborg]

> API changes for the FFM API (third preview)
> 
> Specdiff:
> https://cr.openjdk.org/~pminborg/panama/21/v1/specdiff/overview-summary.html
> 
> Javadoc:
> https://cr.openjdk.org/~pminborg/panama/21/v1/javadoc/java.base/module-summary.html

Per Minborg has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 33 commits:

 - Merge master
 - Improve code snipet
 - Update JEP number and name
 - Update src/java.base/share/classes/java/lang/foreign/MemorySegment.java
   
   Co-authored-by: Maurizio Cimadamore <54672762+mcimadamore at users.noreply.github.com>
 - Update src/java.base/share/classes/java/lang/foreign/MemorySegment.java
   
   Co-authored-by: Maurizio Cimadamore <54672762+mcimadamore at users.noreply.github.com>
 - Cleanup finality
 - Merge pull request #1 from JornVernee/Fix_ULE
   
   Fix ULE when intializing LibFallback
 - fix ULE when intializing LibFallback
 - Remove unused method and declare class final
 - Fix copyrigth year issues
 - ... and 23 more: https://git.openjdk.org/jdk/compare/2e59d21e...0ee65ac1

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Changes: https://git.openjdk.org/jdk/pull/13079/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13079&range=18
  Stats: 13133 lines in 268 files changed: 5016 ins; 6013 del; 2104 mod
  Patch: https://git.openjdk.org/jdk/pull/13079.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13079/head:pull/13079

PR: https://git.openjdk.org/jdk/pull/13079