Refactor GatorPermissionsController for simplification and improved permission storage

[jeffsmale90]

…ermission storage

• Replace gatorPermissionsMapSerialized state with grantedPermissions array (PermissionInfoWithMetadata[])
• Change GatorPermissionsController constructor to accept config object
• Replaced isGatorPermissionsEnabled with enabledPermissionTypes property and removed related GatorPermissionsNotEnabledError
• Updated fetchAndUpdateGatorPermissions to be parameterless
• Replace getPendingRevocations with isPendingRevocation(permissionContext); as an interim change to moving revocation entirely internal to the controller
• Add executeSnapRpc utility function to handle Snap RPC requests
• Drop custom permission support from types, mocks, and mock tests
• Add test coverage for specific controller error types

Explanation

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them