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

idea/testData/quickfix/createFromUsage/createFunction/call/funOnUserObject.kt

@@ -0,0 +1,7 @@
+// "Create function 'foo'" "true"
+
+object A
+
+fun test() {
+    val a: Int = A.<caret>foo(2)
+}