[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/nullabilityAndSmartCasts/kt2146.kt

@@ -1,3 +1,4 @@
+// !WITH_NEW_INFERENCE
 //KT-2146 Nullability casts in when.
 package kt2146
 
@@ -9,46 +10,46 @@ fun f1(s: Int?): Int {
 }
 
 fun f2(s: Int?): Int {
-    return when (s) {
-        !is Int -> <!TYPE_MISMATCH!>s<!>
+    return <!NI;TYPE_MISMATCH!>when (s) {
+        !is Int -> <!OI;TYPE_MISMATCH!>s<!>
         else -> <!DEBUG_INFO_SMARTCAST!>s<!>
-    }
+    }<!>
 }
 
 fun f3(s: Int?): Int {
-    return when (s) {
+    return <!NI;TYPE_MISMATCH!>when (s) {
         is Int -> <!DEBUG_INFO_SMARTCAST!>s<!>
-        else -> <!TYPE_MISMATCH!>s<!>
-    }
+        else -> <!OI;TYPE_MISMATCH!>s<!>
+    }<!>
 }
 
 fun f4(s: Int?): Int {
-    return when {
+    return <!NI;TYPE_MISMATCH!>when {
         s == 4 -> <!DEBUG_INFO_SMARTCAST!>s<!>
-        s == null -> <!TYPE_MISMATCH, DEBUG_INFO_CONSTANT!>s<!>
+        s == null -> <!OI;TYPE_MISMATCH, DEBUG_INFO_CONSTANT!>s<!>
         else -> <!DEBUG_INFO_SMARTCAST!>s<!>
-    }
+    }<!>
 }
 
 fun f5(s: Int?): Int {
-    return when (s) {
-        s -> <!TYPE_MISMATCH!>s<!>
+    return <!NI;TYPE_MISMATCH!>when (s) {
+        s -> <!OI;TYPE_MISMATCH!>s<!>
         s!! -> <!DEBUG_INFO_SMARTCAST!>s<!>
         s -> <!DEBUG_INFO_SMARTCAST!>s<!>
         else -> 0
-    }
+    }<!>
 }
 
 fun f6(s: Int?): Int {
-    return when {
+    return <!NI;TYPE_MISMATCH!>when {
         s is Int -> <!DEBUG_INFO_SMARTCAST!>s<!>
-        else -> <!TYPE_MISMATCH!>s<!>
-    }
+        else -> <!OI;TYPE_MISMATCH!>s<!>
+    }<!>
 }
 
 fun f7(s: Int?): Int {
-    return when {
-        s !is Int -> <!TYPE_MISMATCH!>s<!>
+    return <!NI;TYPE_MISMATCH!>when {
+        s !is Int -> <!OI;TYPE_MISMATCH!>s<!>
         else -> <!DEBUG_INFO_SMARTCAST!>s<!>
-    }
+    }<!>
 }