Rework the notification for scripts out of project

Add an option to link external gradle project
remove an option to load configuration manually because it cannot be implemented properly: script configurations for those scripts shouldn't be loaded during import for Gradle 6.0

^KT-37178 Fixed

idea/idea-gradle/res/messages/KotlinIdeaGradleBundle.properties

@@ -1,4 +1,4 @@
-action.label.text.load.script.configuration=Load script configuration
+action.label.text.load.script.configuration=Load related Gradle project
 action.text.install=Install
 action.text.show.kotlin.gradle.dsl.logs.in=Show Kotlin Gradle DSL Logs in {0}
 build.0.project=Build {0}
@@ -42,7 +42,7 @@ text.was.modified={0} was modified
 title.configure.kotlin.gradle.plugin=Configure Kotlin-Gradle Plugin
 title.kotlin.build.script=Gradle Kotlin DSL Scripts errors
 title.update.language.version=Update Language Version
-tool.tip.text.the.external.gradle.project.needs.to.be.imported.to.get.this.script.analyzed=The external Gradle project needs to be imported to get this script analyzed. <br/>You can import the related Gradle project or click "{0}" to get code insight without importing.
+tool.tip.text.the.external.gradle.project.needs.to.be.imported.to.get.this.script.analyzed=The external Gradle project needs to be imported to get this script analyzed. <br/>Load related Gradle project to add it to the list of imported Gradle Projects.
 display.name.kotlin.multiplatform=Kotlin/Multiplatform
 display.name.kotlin.jvm=Kotlin/JVM
 display.name.kotlin.js.for.node.js=Kotlin/JS for Node.js

idea/idea-gradle/src/org/jetbrains/kotlin/idea/scripting/gradle/GradleScriptOutOfSourceNotificationProvider.kt

@@ -6,6 +6,8 @@
 package org.jetbrains.kotlin.idea.scripting.gradle
 
 import com.intellij.icons.AllIcons
+import com.intellij.openapi.externalSystem.service.execution.ProgressExecutionMode
+import com.intellij.openapi.externalSystem.util.ExternalSystemUtil
 import com.intellij.openapi.fileEditor.FileEditor
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.Key
@@ -14,7 +16,8 @@ import com.intellij.ui.EditorNotificationPanel
 import com.intellij.ui.EditorNotifications
 import org.jetbrains.kotlin.idea.KotlinFileType
 import org.jetbrains.kotlin.idea.KotlinIdeaGradleBundle
-import org.jetbrains.kotlin.idea.core.script.ScriptConfigurationManager
+import org.jetbrains.plugins.gradle.settings.GradleProjectSettings
+import org.jetbrains.plugins.gradle.util.GradleConstants
 
 class GradleScriptOutOfSourceNotificationProvider(private val project: Project) : EditorNotifications.Provider<EditorNotificationPanel>() {
     override fun getKey(): Key<EditorNotificationPanel> = KEY
@@ -26,16 +29,28 @@ class GradleScriptOutOfSourceNotificationProvider(private val project: Project)
         if (!isInAffectedGradleProjectFiles(project, file.path)) {
             return EditorNotificationPanel().apply {
                 text(KotlinIdeaGradleBundle.message("text.the.associated.gradle.project.isn.t.imported"))
-                val loadScriptConfigurationText = KotlinIdeaGradleBundle.message("action.label.text.load.script.configuration")
-                createActionLabel(loadScriptConfigurationText) {
-                    ScriptConfigurationManager.getInstance(project).forceReloadConfiguration(file, loaderForOutOfProjectScripts)
+
+                val linkProjectText = KotlinIdeaGradleBundle.message("action.label.text.load.script.configuration")
+                createActionLabel(linkProjectText) {
+                    val newProjectSettings = GradleProjectSettings()
+                    newProjectSettings.externalProjectPath = file.parent.path
+                    ExternalSystemUtil.linkExternalProject(
+                        GradleConstants.SYSTEM_ID,
+                        newProjectSettings,
+                        project,
+                        {
+
+                        },
+                        false,
+                        ProgressExecutionMode.IN_BACKGROUND_ASYNC
+                    )
                 }
                 val link = createActionLabel("") {}
                 link.setIcon(AllIcons.General.ContextHelp)
                 link.setUseIconAsLink(true)
                 link.toolTipText = KotlinIdeaGradleBundle.message(
                     "tool.tip.text.the.external.gradle.project.needs.to.be.imported.to.get.this.script.analyzed",
-                    loadScriptConfigurationText
+                    linkProjectText
                 )
             }
         }