FIR: Add workaround for OverloadResolutionByLambdaReturnType

Mostly, that should help for existing flatMap usages

^KT-43129 Submitted

compiler/testData/diagnostics/testsWithStdLib/coroutines/kt41430.fir.kt

@@ -3,18 +3,18 @@
 class A
 
 fun test_1(list: List<Set<A>>) {
-    list.<!AMBIGUITY!>flatMapTo<!>(mutableSetOf()) { <!UNRESOLVED_REFERENCE!>it<!> }
+    list.flatMapTo(mutableSetOf()) { it }
 }
 
 fun test_2(list: List<Set<A>>) {
     sequence<A> {
-        <!DEBUG_INFO_EXPRESSION_TYPE("ERROR CLASS: Ambiguity: flatMapTo, [kotlin/collections/flatMapTo, kotlin/collections/flatMapTo]")!>list.<!AMBIGUITY!>flatMapTo<!>(mutableSetOf()) { <!UNRESOLVED_REFERENCE!>it<!> }<!>
+        <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.collections.MutableSet<A>")!>list.flatMapTo(mutableSetOf()) { it }<!>
     }
 }
 
 fun test_3(list: List<Set<A>>) {
     sequence {
-        list.<!AMBIGUITY!>flatMapTo<!>(mutableSetOf()) { <!UNRESOLVED_REFERENCE!>it<!> }
+        list.flatMapTo(mutableSetOf()) { it }
         yield(A())
     }
 }
@@ -22,6 +22,6 @@ fun test_3(list: List<Set<A>>) {
 fun test_4(list: List<Set<A>>) {
     sequence {
         yield(A())
-        list.<!AMBIGUITY!>flatMapTo<!>(mutableSetOf()) { <!UNRESOLVED_REFERENCE!>it<!> }
+        list.flatMapTo(mutableSetOf()) { it }
     }
 }