[FIR] Implement FUNCTION_EXPECTED

compiler/testData/diagnostics/tests/resolve/invoke/errors/unresolvedInvoke.fir.kt

@@ -1,5 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 fun foo(i: Int) {
     <!UNRESOLVED_REFERENCE!>i<!>()
-    <!UNRESOLVED_REFERENCE!>1<!>()
-}
+    <!FUNCTION_EXPECTED!>1<!>()
+}

compiler/testData/diagnostics/tests/resolve/invoke/errors/wrongReceiverForInvokeOnExpression.fir.kt

@@ -1,7 +1,7 @@
 
 fun test1() {
-    1. (<!UNRESOLVED_REFERENCE!>fun String.(i: Int) = i<!> )(1)
-    1.(<!UNRESOLVED_REFERENCE!>label@ fun String.(i: Int) = i<!> )(1)
+    1. (<!FUNCTION_EXPECTED!>fun String.(i: Int) = i<!> )(1)
+    1.(<!FUNCTION_EXPECTED!>label@ fun String.(i: Int) = i<!> )(1)
 }
 
 fun test2(f: String.(Int) -> Unit) {
@@ -12,5 +12,5 @@ fun test2(f: String.(Int) -> Unit) {
 fun test3() {
     fun foo(): String.(Int) -> Unit = {}
 
-    1.(<!UNRESOLVED_REFERENCE!>foo()<!>)(1)
+    1.(<!FUNCTION_EXPECTED!>foo()<!>)(1)
 }