Use _type in op_type REST test (#48418)

Closes #48396

Author: ywelsch

rest-api-spec/src/main/resources/rest-api-spec/test/bulk/11_basic_with_types.yml

@@ -86,6 +86,7 @@
           - f: 4
           - index:
               _index: test
+              _type: type
               op_type: create
           - f: 5
   - match: { errors: true }