AMBARI-25723. Enable squash and merge in GitHub PR (#3348)

* AMBARI-25723. Enable squash and merge in GitHub PR

* Update according to Brahma's comments.
diff --git a/.asf.yaml b/.asf.yaml
new file mode 100644
index 0000000..881933f
--- /dev/null
+++ b/.asf.yaml
@@ -0,0 +1,29 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+github:
+  description: "Apache Ambari simplifies provisioning, managing, and monitoring of Apache Hadoop clusters."
+  homepage: https://ambari.apache.org
+  labels:
+    - javascript
+    - python
+    - java
+    - big-data
+    - ambari
+  enabled_merge_buttons:
+    squash:  true
+    merge:   false
+    rebase:  false
+notifications:
+  commits:      commits@ambari.apache.org