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

idea/testData/quickfix/createFromUsage/createClass/callExpression/singleArgCallInAnnotationEntry.kt

@@ -0,0 +1,6 @@
+// "Create annotation 'bar'" "true"
+// ERROR: Unresolved reference: foo
+
+[foo(1, "2", <caret>bar("3"))] fun test() {
+
+}