[FIR] Fix missing receiver type if anonymous function without label

compiler/testData/diagnostics/tests/inference/upperBounds/conflictingSubstitutionsFromUpperBound.fir.kt

@@ -1,12 +0,0 @@
-// !CHECK_TYPE
-
-package g
-
-import java.util.HashSet
-fun <T, C: Collection<T>> convert(src: Collection<T>, dest: C): C = throw Exception("$src $dest")
-
-fun test(l: List<Int>) {
-    //todo should be inferred
-    val r = convert(l, HashSet())
-    r checkType { <!UNRESOLVED_REFERENCE!>_<!><HashSet<Int>>() }
-}

compiler/testData/diagnostics/tests/inference/upperBounds/conflictingSubstitutionsFromUpperBound.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !CHECK_TYPE
 
 package g

compiler/testData/diagnostics/tests/inference/upperBounds/typeParameterAsUpperBound.fir.kt

@@ -9,8 +9,8 @@ public fun <T> listOf(t: T): List<T> = TODO()
 
 fun usage(c: List<String>) {
     val cn = c.ifEmpty { null }
-    cn checkType { <!UNRESOLVED_REFERENCE!>_<!><List<String>?>() }
+    cn checkType { _<List<String>?>() }
 
     val cs = c.ifEmpty { listOf("x") }
-    cs checkType { <!UNRESOLVED_REFERENCE!>_<!><List<String>>() }
+    cs checkType { _<List<String>>() }
 }