[NI] Turn off KnownTypeParameterSubstitutor for NI

The main consequence of it is that TYPE_MISMATCH range for control
structures became wider.

Also, for extra safety, don't change behaviour of OI.

compiler/testData/diagnostics/tests/smartCasts/publicVals/delegate.kt

@@ -14,7 +14,7 @@ class Example {
 
     public fun foo(): String {
         // Smart cast is not possible if property is delegated
-        return if (p != null) <!NI;SMARTCAST_IMPOSSIBLE, SMARTCAST_IMPOSSIBLE!>p<!> else ""
+        return <!NI;TYPE_MISMATCH!>if (p != null) <!NI;SMARTCAST_IMPOSSIBLE, SMARTCAST_IMPOSSIBLE!>p<!> else ""<!>
     }
 
     public fun bar(): String {