[Test] Add ability to specify applicability of diagnostic to module or file

compiler/testData/codegen/box/fakeOverride/privateFakeOverrides0.kt

@@ -1,6 +1,6 @@
 // MODULE: lib
-// FILE: lib.kt
 // WITH_RUNTIME
+// FILE: lib.kt
 
 import kotlin.test.assertEquals
 

compiler/testData/codegen/box/fakeOverride/privateFakeOverrides1.kt

@@ -1,6 +1,6 @@
 // MODULE: lib
-// FILE: lib.kt
 // WITH_RUNTIME
+// FILE: lib.kt
 
 import kotlin.test.assertEquals