Apply yaml-rest-compat-test to rest-api-spec (#69462)

Author: joegallo

modules/reindex/build.gradle

@@ -166,11 +166,11 @@ tasks.named("yamlRestCompatTest").configure {
     'reindex/20_validation/reindex without source gives useful error message', /* type in exception message */
     'reindex/85_scripting/Reindex all docs with one doc deletion', /*type in a request*/
     'delete_by_query/10_basic/Limit by size',
-    'delete_by_query/10_basic/Response for version conflict \\(seq no powered\\)',
+    'delete_by_query/10_basic/Response for version conflict (seq no powered)',
     'delete_by_query/20_validation/both max_docs and size fails',
     'delete_by_query/20_validation/invalid size fails',
     'update_by_query/10_basic/Limit by size',
-    'update_by_query/10_basic/Response for version conflict \\(seq no powered\\)',
+    'update_by_query/10_basic/Response for version conflict (seq no powered)',
     'update_by_query/20_validation/inconsistent max_docs and size fails',
     'update_by_query/20_validation/invalid size fails',
     'update_by_query/20_validation/update_by_query without source gives useful error message'