Fix import quickfix if import has import alias

#KT-30669 Fixed
 #KT-7380 Fixed
 #KT-30663 Fixed

idea/testData/quickfix/autoImports/importAliasClassAlreadyExists.before.Main.kt

@@ -0,0 +1,7 @@
+// "Import" "true"
+// ERROR: Unresolved reference: ImportedClass
+
+import editor.completion.apx.ImportedClass as Class2
+fun context() {
+    val c: <caret>ImportedClass
+}