AddThrowsAnnotationIntention: improve for mpp

#KT-38391 Fixed

idea/testData/multiModuleQuickFix/addThrowAnnotation/common/common_dep(stdlib)/common.kt

@@ -0,0 +1,7 @@
+// "Add '@Throws' annotation" "true"
+
+class FooException : Exception()
+
+fun test() {
+    <caret>throw FooException()
+}

idea/testData/multiModuleQuickFix/addThrowAnnotation/common/common_dep(stdlib)/common.kt.after

@@ -0,0 +1,8 @@
+// "Add '@Throws' annotation" "true"
+
+class FooException : Exception()
+
+@Throws(FooException::class)
+fun test() {
+    throw FooException()
+}