Add empty test in blueprints folder

tests/blueprints/test_empty.py

@@ -0,0 +1,21 @@
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+def test_dummy():
+  """
+  Blueprint tests are mostly run from READMEs now. Leave an empty
+  test so pipelines don't fail because of an empty test suite
+  """
+  assert True