[FIR] Replace uninferred type variables and stub types during delegate inference

compiler/testData/diagnostics/tests/delegation/kt44843.fir.kt

@@ -1,13 +1,13 @@
 // WITH_STDLIB
 
 // FILE: test.kt
-val bar2 by <!DELEGATE_SPECIAL_FUNCTION_AMBIGUITY, NO_VALUE_FOR_PARAMETER!>bar2()<!>
+val bar2 by <!NO_VALUE_FOR_PARAMETER!>bar2()<!>
 
 // FILE: lt/neworld/compiler/Foo.kt
 package lt.neworld.compiler
 
 class Foo {
-    val bar by <!DELEGATE_SPECIAL_FUNCTION_AMBIGUITY, NO_VALUE_FOR_PARAMETER!>bar()<!>
+    val bar by <!NO_VALUE_FOR_PARAMETER!>bar()<!>
 }
 
 // FILE: lt/neworld/compiler/bar/Bar.kt