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

idea/testData/quickfix/addStarProjections/cast/changeToStarProjection.kt

@@ -0,0 +1,4 @@
+// "Change type arguments to <*>" "true"
+public fun foo(a: Any) {
+    a as List<Int><caret>
+}