[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)
 }

compiler/testData/diagnostics/tests/resolve/invoke/invokeAndSmartCast.fir.kt

@@ -2,11 +2,11 @@ class A(val x: (String.() -> Unit)?)
 
 fun test(a: A) {
     if (a.x != null) {
-        "".(<!UNRESOLVED_REFERENCE!>a.x<!>)()
+        "".(<!FUNCTION_EXPECTED!>a.x<!>)()
         a.x("") // todo
         (a.x)("")
     }
-    "".(<!UNRESOLVED_REFERENCE!>a.x<!>)()
+    "".(<!FUNCTION_EXPECTED!>a.x<!>)()
     a.<!UNSAFE_IMPLICIT_INVOKE_CALL!>x<!>("")
     <!UNSAFE_IMPLICIT_INVOKE_CALL!>(a.x)<!>("")
 

compiler/testData/diagnostics/tests/resolve/invoke/kt30695_2.fir.kt

@@ -26,7 +26,7 @@ val Cls.extensionProperty: MemberInvokeOwner
 
 fun testNullableReceiver(nullable: Cls?) {
     nullable?.extensionProperty()
-    nullable.<!UNRESOLVED_REFERENCE!>extensionProperty<!>()
+    nullable.<!FUNCTION_EXPECTED!>extensionProperty<!>()
 }
 
 fun testNotNullableReceiver(notNullable: Cls) {