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

compiler/testData/diagnostics/tests/generics/varProjection/setterNotProjectedOutAssign.fir.kt

@@ -6,5 +6,5 @@ interface Tr<T> {
 
 fun test(t: Tr<*>) {
     t.v = t
-    t.v checkType { <!UNRESOLVED_REFERENCE!>_<!><Tr<*>>() }
+    t.v checkType { <!INAPPLICABLE_CANDIDATE!>_<!><Tr<*>>() }
 }

compiler/testData/diagnostics/tests/generics/varProjection/setterProjectedOutAssign.fir.kt

@@ -10,5 +10,5 @@ fun test(t: Tr<*>) {
     t.v = null!!
     t.v = ""
     t.v = null
-    t.v checkType { <!UNRESOLVED_REFERENCE!>_<!><Any?>() }
+    t.v checkType { _<Any?>() }
 }