Don't apply Unit-conversion for expressions that return Nothing type

compiler/testData/diagnostics/tests/unitConversion/unitConversionDisabledForSimpleArguments.kt

@@ -1,4 +1,4 @@
-// !LANGUAGE: -SuspendConversion
+// !LANGUAGE: -UnitConversion
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 fun foo(f: () -> Unit) {}
@@ -7,9 +7,15 @@ fun bar(): Int = 0
 
 abstract class SubInt : () -> Int
 
-fun test(f: () -> String, s: SubInt) {
+fun <T> T.freeze(): T = TODO()
+
+fun test(f: () -> String, g: () -> Nothing, h: () -> Nothing?, s: SubInt) {
     foo { "lambda" }
     foo(::bar)
+    foo({ TODO() }.freeze())
+    foo(g)
+
+    foo(<!UNSUPPORTED_FEATURE!>h<!>)
 
     foo(<!UNSUPPORTED_FEATURE!>f<!>)
     foo(<!UNSUPPORTED_FEATURE!>s<!>)