Extraction Engine: Forbid extraction of non-singleton qualifiers

#KT-8297 Fixed

idea/testData/refactoring/extractFunction/basic/classQualifier.kt

@@ -0,0 +1,11 @@
+class A {
+    companion object {
+        fun foo() {
+
+        }
+    }
+}
+
+fun bar() {
+    <selection>A</selection>.foo()
+}

idea/testData/refactoring/extractFunction/basic/classQualifier.kt.conflicts

@@ -0,0 +1 @@
+Cannot perform refactoring without an expression

idea/testData/refactoring/extractFunction/basic/enumQualifier.kt

@@ -0,0 +1,7 @@
+enum class E {
+    A, B, C
+}
+
+fun bar() {
+    val t = <selection>E</selection>.A
+}

idea/testData/refactoring/extractFunction/basic/enumQualifier.kt.conflicts

@@ -0,0 +1 @@
+Cannot perform refactoring without an expression

idea/testData/refactoring/extractFunction/basic/objectQualifier.kt

@@ -0,0 +1,9 @@
+object A {
+    fun foo() {
+
+    }
+}
+
+fun bar() {
+    <selection>A</selection>.foo()
+}

idea/testData/refactoring/extractFunction/basic/objectQualifier.kt.after

@@ -0,0 +1,11 @@
+object A {
+    fun foo() {
+
+    }
+}
+
+fun bar() {
+    a().foo()
+}
+
+private fun a() = A

idea/testData/refactoring/extractFunction/basic/packageQualifier.kt

@@ -0,0 +1,9 @@
+package p
+
+fun foo() {
+
+}
+
+fun bar() {
+    <selection>p</selection>.foo()
+}

idea/testData/refactoring/extractFunction/basic/packageQualifier.kt.conflicts

@@ -0,0 +1 @@
+Cannot perform refactoring without an expression