Check element disposed before getting component in migration (EA-134713)

Check if it can reduce the exceptions rate and check for deeper exceptions.

idea/idea-maven/src/org/jetbrains/kotlin/idea/maven/MavenImportListener.kt

@@ -19,7 +19,7 @@ class MavenImportListener(val project: Project) : MavenProjectsManager.Listener
             MavenImportListener.TOPIC,
             MavenImportListener { _: Collection<MavenProject>, _: List<Module> ->
                 notifyOutdatedBundledCompilerIfNecessary(project)
-                KotlinMigrationProjectComponent.getInstance(project).onImportFinished()
+                KotlinMigrationProjectComponent.getInstanceIfNotDisposed(project)?.onImportFinished()
             }
         )
 
@@ -27,6 +27,6 @@ class MavenImportListener(val project: Project) : MavenProjectsManager.Listener
     }
 
     override fun projectsScheduled() {
-        KotlinMigrationProjectComponent.getInstance(project).onImportAboutToStart()
+        KotlinMigrationProjectComponent.getInstanceIfNotDisposed(project)?.onImportAboutToStart()
     }
 }

idea/idea-maven/test/org/jetbrains/kotlin/idea/maven/MavenMigrateTest.kt

@@ -104,7 +104,8 @@ class MavenMigrateTest : MavenImportingTestCase() {
         }
 
         val importResult = FutureResult<KotlinMigrationProjectComponent.MigrationTestState?>()
-        val migrationProjectComponent = KotlinMigrationProjectComponent.getInstance(myProject)
+        val migrationProjectComponent = KotlinMigrationProjectComponent.getInstanceIfNotDisposed(myProject)
+            ?: error("Disposed project")
 
         migrationProjectComponent.setImportFinishListener { migrationState ->
             importResult.set(migrationState)