[foreign-jextract] RFR: 8241504: Expose MemoryLayout annotations/attributes in the public API (foreign-jextract part)

[Jorn Vernee]

Hi,

These are the jextract changes needed after exposing layout attributes in the public API. This also fixes the pending
merge conflict, which was closely related to the needed changes.

Jorn

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Commit messages:
 - Jextract changes after exposing attributes in the public API
 - Merge branch 'foreign-abi' into foreign-jextract
 - 8241504: Expose MemoryLayout annotations/attributes in the public API

Changes: https://git.openjdk.java.net/panama-foreign/pull/69/files
 Webrev: https://webrevs.openjdk.java.net/panama-foreign/69/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8241504
  Stats: 411 lines in 20 files changed: 217 ins; 57 del; 137 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/69.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/69/head:pull/69

PR: https://git.openjdk.java.net/panama-foreign/pull/69