FIR checker: skip error named reference if receiver is unresolved

Currently, FIR reports errors caused by previous resolution failure. For
example with unresolved `a` and `b` in code `a.b`, both `a` and `b` are
highlighted. FE1.0 only highlights `a` since it's the root cause. This
change applies this heuristics when reporting FirDiagnostics.

compiler/testData/diagnostics/tests/j+k/differentFilename.fir.kt

@@ -22,5 +22,5 @@ fun main(x: A) {
     x.b().<!UNRESOLVED_REFERENCE!>bar<!>()
     x.f().<!UNRESOLVED_REFERENCE!>foobaz<!>()
 
-    <!UNRESOLVED_REFERENCE!>D<!>().<!UNRESOLVED_REFERENCE!>baz<!>()
+    <!UNRESOLVED_REFERENCE!>D<!>().baz()
 }