[GR-78020] Use generated wrappers when accessing guest annotations

[graalvmbot]

Champion reviewer: Josef Eisl

Summary

When Native Image runs with an external JVMCI runtime, annotation data belongs to the guest VM. Build-time code previously converted that data into java.lang.Annotation proxy objects in the builder VM, even when it only needed to check whether an annotation exists or read a few members.

This PR removes those unnecessary builder-side proxies:

• Presence checks inspect guest annotation data directly.
• Consumers that read annotation members use AnnotationValue or generated typed *GuestValue records.
• Repeatable annotations are read as direct and container AnnotationValue entries and then converted through generated wrappers.
• Generated records read all annotation members when they are created, reporting malformed internal annotations immediately.
• The obsolete conversion from builder annotation objects back to AnnotationValue is removed.
• The remaining C-interface callbacks that require builder classes are documented and tracked by GR-78934.

Commit Structure

The eight commits first introduce generated direct-access helpers and convert preexisting ordinary wrapper lookups. The remaining commits separate removal of the reverse conversion, conversion of presence-only checks, adoption of existing generated records, generation of additional records, migration of member-reading consumers, and migration of repeatable annotations.

Scope

This PR migrates all build-time builder-to-guest annotation consumers, including repeatable annotations and their generated container annotations. Five annotation lookups remain in compiler code shared between image building and the Crema or Ristretto runtime compiler paths; they intentionally retain the runtime-aware API.

Three C-interface configuration callbacks still require builder classes. GR-78934 tracks moving those callbacks into the guest context and removing the remaining class-conversion boundaries.