Regular modifier checker implemented (initial version). A set of tests fixed accordingly.

Most of modifier diagnostic is expressed by REDUNDANT_MODIFIER, INCOMPATIBLE_MODIFIERS, REPEATED_MODIFIER, WRONG_MODIFIER_TARGET, WRONG_MODIFIER_PARENT.
A set of modifier diagnostics is not in use now (but not deleted yet).

compiler/testData/codegen/boxInline/complex/with.2.kt

@@ -11,7 +11,7 @@ public  class Output(val d: Data) : Closeable {
     public fun doOutput(data: Int): Int = data
 }
 
-public open interface Closeable {
+public interface Closeable {
     open public fun close() {}
 }