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/CharacterLiterals.fir.kt

@@ -6,8 +6,8 @@ fun test(c : Char) {
   <!UNRESOLVED_REFERENCE!>test<!>(<!ILLEGAL_CONST_EXPRESSION!>'<!>
   <!UNRESOLVED_REFERENCE!>test<!>(0<!ILLEGAL_CONST_EXPRESSION!><!SYNTAX!><!>'<!>
   <!UNRESOLVED_REFERENCE!>test<!>('\n')
-  <!UNRESOLVED_REFERENCE!>test<!>('\\')
-  <!UNRESOLVED_REFERENCE!>test<!>(<!ILLEGAL_CONST_EXPRESSION!>''<!><!ILLEGAL_CONST_EXPRESSION!><!SYNTAX!><!>''<!>)
+  test('\\')
+  test(<!ILLEGAL_CONST_EXPRESSION!>''<!><!ILLEGAL_CONST_EXPRESSION!><!SYNTAX!><!>''<!>)
   test('\'')
   test('\"')
 }