python-custom-rules should only be downloaded when there are Python files

Compatible with SonarQube 10.4

Author: agigleux

python-custom-rules/pom.xml

@@ -54,6 +54,7 @@
           <requirePlugins>python:${sonar.python.version}</requirePlugins>
           <sonarLintSupported>true</sonarLintSupported>
           <skipDependenciesPackaging>true</skipDependenciesPackaging>
+          <requiredForLanguages>python</requiredForLanguages>
         </configuration>
       </plugin>