Core: Rename ID name and plural_name for annotations

This resolves a bug #143101 caused by 20383e4d82
`outliner_idcode_to_plural` fails to find correcty idtype with old
plural name. Fix this so it matches with `MainCollectionDef`.

Pull Request: https://projects.blender.org/blender/blender/pulls/143179

source/blender/blenkernel/intern/gpencil_legacy.cc

@@ -267,8 +267,8 @@ IDTypeInfo IDType_ID_GD_LEGACY = {
     /*dependencies_id_types*/ FILTER_ID_MA,
     /*main_listbase_index*/ INDEX_ID_GD_LEGACY,
     /*struct_size*/ sizeof(bGPdata),
-    /*name*/ "GPencil",
-    /*name_plural*/ N_("grease_pencils"),
+    /*name*/ "Annotation",
+    /*name_plural*/ N_("annotations"),
     /*translation_context*/ BLT_I18NCONTEXT_ID_GPENCIL,
     /*flags*/ IDTYPE_FLAGS_APPEND_IS_REUSABLE,
     /*asset_type_info*/ nullptr,