Big change in quickfix tests: no stupid test data format with "before" and "after" file prefixes

idea/testData/quickfix/createFromUsage/createFunction/component/createComponentFromUsage2.kt

@@ -0,0 +1,8 @@
+// "Create function 'component3'" "true"
+class Foo<T> {
+    fun component1(): Int { return 0 }
+    fun component2(): Int { return 0 }
+}
+fun foo() {
+    val (a, b, c: String) = Foo<caret><Int>()
+}