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

idea/testData/quickfix/createFromUsage/createClass/callExpression/callWithObjectQualifier.kt.after

@@ -0,0 +1,12 @@
+// "Create class 'Foo'" "true"
+
+object A {
+    class Foo(i: Int) {
+
+    }
+
+}
+
+fun test() {
+    val a = A.Foo(2)
+}