[FIR] Implement FUNCTION_EXPECTED

compiler/fir/analysis-tests/testData/resolve/expresssions/invoke/threeReceivers.fir.txt

@@ -32,7 +32,7 @@ FILE: threeReceivers.kt
             }
 
         public final fun R|FooBar|.chk(buz: R|Buz|): R|kotlin/Unit| {
-            R|<local>/buz|.<Unresolved name: foobar>#()
+            R|<local>/buz|.<Expression 'foobar' of type 'Bar' cannot be invoked as a function>#()
         }
 
     }

compiler/fir/analysis-tests/testData/resolve/expresssions/invoke/threeReceivers.kt

@@ -17,6 +17,6 @@ class Foo {
         // this@Foo is dispatch receiver of foobar
         // Foo/foobar is dispatch receiver of invoke
         // this@chk is extension receiver of invoke
-        buz.<!UNRESOLVED_REFERENCE!>foobar<!>()
+        buz.<!FUNCTION_EXPECTED!>foobar<!>()
     }
 }