[GR-72636] Move guest code out of ImageClassLoader into GuestTypes

[graalvmbot]

This PR refactors the Native Image build pipeline to introduce a clear separation between guest (application code) and builder (image builder code) class handling by extracting guest-related logic from ImageClassLoader into a new GuestTypes class.

Key Changes:

• Introduced the GuestTypes class to encapsulate all queries, analysis, and metadata collection related to guest/application types, methods, and fields.
• Removed guest-related type/method/field management from ImageClassLoader and delegated queries (e.g., findAnnotatedMethods, findSubtypes, etc.) to GuestTypes.
• Adjusted supporting code to reflect the new architecture:
  • Moved methods such as findSubtypes, findAnnotatedMethods, and findAnnotatedFields to GuestTypes.
  • Updated feature implementations and registration code to use GuestTypes for all guest code introspection.
  • Modified handling of class- and package-based options parsing (e.g., for reflection, preservation, dynamic access) to use GuestTypes.
• Updated library import and annotation processing logic (e.g., for C libraries, JNIAccess, etc.) to leverage JVMCI reflection throughout.
• Made minor related fixes in type resolution, class initialization support, and metrics/utility classes to ensure consistent use of GuestTypes.