[NI] Don't discriminate Nothing-type from resulting ones

^KT-32106 Fixed

compiler/testData/diagnostics/tests/when/whenAndLambdaWithExpectedType.kt

@@ -7,19 +7,19 @@ val test1: (String) -> Boolean =
 
 val test2: (String) -> Boolean =
         when {
-            true -> {{ true }}
+            true -> <!NI;TYPE_MISMATCH!>{{ true }}<!>
             else -> null!!
         }
 
 val test3: (String) -> Boolean =
         when {
-            true -> { <!UNUSED_ANONYMOUS_PARAMETER!>s<!> -> true }
+            true -> <!NI;TYPE_MISMATCH!>{ <!UNUSED_ANONYMOUS_PARAMETER!>s<!> -> true }<!>
             else -> null!!
         }
 
 val test4: (String) -> Boolean =
         when {
-            true -> <!NI;TYPE_MISMATCH!>{ <!EXPECTED_PARAMETERS_NUMBER_MISMATCH!><!UNUSED_ANONYMOUS_PARAMETER!>s1<!>, <!CANNOT_INFER_PARAMETER_TYPE, UNUSED_ANONYMOUS_PARAMETER!>s2<!><!> -> true }<!>
+            true -> <!NI;TYPE_MISMATCH!>{ <!OI;EXPECTED_PARAMETERS_NUMBER_MISMATCH!><!UNUSED_ANONYMOUS_PARAMETER!>s1<!>, <!OI;CANNOT_INFER_PARAMETER_TYPE, UNUSED_ANONYMOUS_PARAMETER!>s2<!><!> -> true }<!>
             else -> null!!
         }
 

compiler/testData/diagnostics/tests/when/whenWithNothingAndLambdas.kt

@@ -6,7 +6,7 @@ val <!OI;IMPLICIT_NOTHING_PROPERTY_TYPE!>test1<!> = when {
 }
 
 val test1a: () -> Boolean = when {
-    true -> { { true } }
+    true -> <!NI;TYPE_MISMATCH!>{ { true } }<!>
     else -> TODO()
 }
 
@@ -33,7 +33,7 @@ val <!OI;IMPLICIT_NOTHING_PROPERTY_TYPE!>test3<!> = when {
 }
 
 val test3a: () -> Boolean = when {
-    true -> { { true } }
-    true -> { { true } }
+    true -> <!NI;TYPE_MISMATCH!>{ { true } }<!>
+    true -> <!NI;TYPE_MISMATCH!>{ { true } }<!>
     else -> TODO()
 }