Add python gateway property file to bin tarball (#8664)

Author: zhongjiajie

dolphinscheduler-dist/src/main/assembly/dolphinscheduler-bin.xml

@@ -118,6 +118,7 @@
             <includes>
                 <include>**/*.yaml</include>
                 <include>**/*.xml</include>
+                <include>**/*.properties</include>
             </includes>
             <outputDirectory>conf</outputDirectory>
         </fileSet>