Update plugins_list_linux.txt with Gradle metadata

Added Gradle module metadata details to plugins list.

Author: devangpratap

tests/packagedcode/data/plugin/plugins_list_linux.txt

@@ -552,6 +552,13 @@ Package type:  maven
   description:       Gradle build script
   path_patterns:    '*/build.gradle', '*/build.gradle.kts'
 --------------------------------------------
+Package type:  maven
+  datasource_id:     gradle_module
+  documentation URL: https://github.com/gradle/gradle/blob/master/subprojects/docs/src/docs/design/gradle-module-metadata-latest-specification.md
+  primary language:  Java
+  description:       Gradle module metadata
+  path_patterns:    '*.module'
+--------------------------------------------
 Package type:  maven
   datasource_id:     maven_pom
   documentation URL: https://maven.apache.org/pom.html