RFR: 8264774: Implementation of Foreign Function and Memory API (Incubator) [v21]

[Maurizio Cimadamore]

> This PR contains the API and implementation changes for JEP-412 [1]. A more detailed description of such changes, to avoid repetitions during the review process, is included as a separate comment.
> 
> [1] - https://openjdk.java.net/jeps/412

Maurizio Cimadamore has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 30 additional commits since the last revision:

 - Merge branch 'master' into JEP-412
 - Fix issue with bounded arena allocator
 - Rename is_entry_blob to is_optimized_entry_blob
   Rename as_entry_blob to as_optimized_entry_blob
   Fix misc typos and indentation issues
 - Take care of remaining references to "Panama"
 - * Replace is_panama_entry_frame() with is_optimized_entry_frame()
   * Replace EntryBlob with OptimizedEntryBlob
 - Address CSR comments
 - * Remove unused imports
   * Fix broken javadoc after removal of @throws clauses
   * Remove other `@CallerSensitive` annotations from `AbstractCLinker`
 - Merge branch 'master' into JEP-412
 - Remove redundant checks for --enable-native-access
 - Fix issue in snippet in package-info
 - ... and 20 more: https://git.openjdk.java.net/jdk/compare/893e2ec1...9eb61a46

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3699/files
  - new: https://git.openjdk.java.net/jdk/pull/3699/files/0c464221..9eb61a46

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3699&range=20
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3699&range=19-20

  Stats: 23427 lines in 753 files changed: 8549 ins; 9558 del; 5320 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3699.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3699/head:pull/3699

PR: https://git.openjdk.java.net/jdk/pull/3699