odb: rename oid_object_info()

Rename `oid_object_info()` to `odb_read_object_info()` as well as their
`_extended()` variant to match other functions related to the object
database and our modern coding guidelines.

Introduce compatibility wrappers so that any in-flight topics will
continue to compile.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

pack-bitmap-write.c

@@ -144,8 +144,8 @@ void bitmap_writer_build_type_index(struct bitmap_writer *writer,
 			break;
 
 		default:
-			real_type = oid_object_info(writer->to_pack->repo,
-						    &entry->idx.oid, NULL);
+			real_type = odb_read_object_info(writer->to_pack->repo->objects,
+							 &entry->idx.oid, NULL);
 			break;
 		}