[NI] Properly detecting suitability of candidate for builder inference

#KT-41430 Fixed

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

@@ -0,0 +1,27 @@
+// ISSUE: KT-41430
+
+class A
+
+fun test_1(list: List<Set<A>>) {
+    list.<!AMBIGUITY!>flatMapTo<!>(mutableSetOf()) { <!UNRESOLVED_REFERENCE!>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<!> }<!>
+    }
+}
+
+fun test_3(list: List<Set<A>>) {
+    sequence {
+        list.<!AMBIGUITY!>flatMapTo<!>(mutableSetOf()) { <!UNRESOLVED_REFERENCE!>it<!> }
+        yield(A())
+    }
+}
+
+fun test_4(list: List<Set<A>>) {
+    sequence {
+        yield(A())
+        list.<!AMBIGUITY!>flatMapTo<!>(mutableSetOf()) { <!UNRESOLVED_REFERENCE!>it<!> }
+    }
+}

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

@@ -0,0 +1,27 @@
+// ISSUE: KT-41430
+
+class A
+
+fun test_1(list: List<Set<A>>) {
+    <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.collections.MutableSet<A>")!>list.flatMapTo(mutableSetOf()) { it }<!>
+}
+
+fun test_2(list: List<Set<A>>) {
+    sequence<A> {
+        <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.collections.MutableSet<A>")!>list.flatMapTo(mutableSetOf()) { it }<!>
+    }
+}
+
+fun test_3(list: List<Set<A>>) {
+    sequence {
+        <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.collections.MutableSet<A>")!>list.flatMapTo(mutableSetOf()) { it }<!>
+        yield(A())
+    }
+}
+
+fun test_4(list: List<Set<A>>) {
+    sequence {
+        yield(A())
+        <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.collections.MutableSet<A>")!>list.flatMapTo(mutableSetOf()) { it }<!>
+    }
+}

compiler/testData/diagnostics/testsWithStdLib/coroutines/kt41430.txt

@@ -0,0 +1,13 @@
+package
+
+public fun test_1(/*0*/ list: kotlin.collections.List<kotlin.collections.Set<A>>): kotlin.Unit
+public fun test_2(/*0*/ list: kotlin.collections.List<kotlin.collections.Set<A>>): kotlin.Unit
+public fun test_3(/*0*/ list: kotlin.collections.List<kotlin.collections.Set<A>>): kotlin.Unit
+public fun test_4(/*0*/ list: kotlin.collections.List<kotlin.collections.Set<A>>): kotlin.Unit
+
+public final class A {
+    public constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}