Refactoring: extract separate manager to update script configurations of gradle scripts

The main goal is to extract logic that is related to Gradle scripts only to separate place.
Configurations for gradle scripts are updated during import simultaneously, there is no need to manage script configuration update for one file
Note that for Gradle less than 6.0 The DefaultScriptingSupport is used

idea/resources/META-INF/scripting-support.xml

@@ -1,7 +1,20 @@
 <idea-plugin>
+  <extensionPoints>
+    <extensionPoint qualifiedName="org.jetbrains.kotlin.scripting.idea.scriptingSupport"
+                    interface="org.jetbrains.kotlin.idea.core.script.configuration.ScriptingSupport"
+                    area="IDEA_PROJECT"/>
+  </extensionPoints>
+
   <extensions defaultExtensionNs="com.intellij">
     <projectService serviceImplementation="org.jetbrains.kotlin.idea.core.script.configuration.utils.ScriptClassRootsStorage"/>
 
     <trafficLightRendererContributor implementation="org.jetbrains.kotlin.idea.core.script.ScriptTrafficLightRendererContributor"/>
   </extensions>
+
+  <extensions defaultExtensionNs="org.jetbrains.kotlin.scripting.idea">
+    <scriptingSupport
+        implementation="org.jetbrains.kotlin.idea.core.script.configuration.DefaultScriptingSupport"
+        order="last"
+    />
+  </extensions>
 </idea-plugin>