[Improvement][alert] Improvement alert plugin dist. (#4731)

* imp dev alert plugin dist.

* update xml code style.

* update xml code style.

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

@@ -151,6 +151,15 @@
 			<outputDirectory>.</outputDirectory>
 		</fileSet>
 
+		<!--alert plugin-->
+		<fileSet>
+			<directory>${basedir}/../dolphinscheduler-dist/target/dolphinscheduler-dist-${project.version}</directory>
+			<includes>
+				<include>**/*.*</include>
+			</includes>
+			<outputDirectory>.</outputDirectory>
+		</fileSet>
+
 		<fileSet>
 			<directory>${basedir}/../dolphinscheduler-ui/dist</directory>
 			<includes>

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

@@ -150,6 +150,14 @@
 			</includes>
 			<outputDirectory>.</outputDirectory>
 		</fileSet>
+		<!--alert plugin-->
+		<fileSet>
+			<directory>${basedir}/../dolphinscheduler-dist/target/dolphinscheduler-dist-${project.version}</directory>
+			<includes>
+				<include>**/*.*</include>
+			</includes>
+			<outputDirectory>.</outputDirectory>
+		</fileSet>
 
 		<fileSet>
 			<directory>${basedir}/../dolphinscheduler-ui/dist</directory>