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/objects/kt21515/callableReferencesOldComplexCases.fir.kt

@@ -12,7 +12,7 @@ object A {
     }
 
     class Derived : Base() {
-        val a = <!UNRESOLVED_REFERENCE!>FromBaseCompanion<!>::<!UNRESOLVED_REFERENCE!>foo<!>
+        val a = <!UNRESOLVED_REFERENCE!>FromBaseCompanion<!>::foo
     }
 }
 
@@ -30,7 +30,7 @@ object B {
     }
 
     class Derived : Base() {
-        val a = <!UNRESOLVED_REFERENCE!>FromBaseCompanion<!>::<!UNRESOLVED_REFERENCE!>foo<!>
+        val a = <!UNRESOLVED_REFERENCE!>FromBaseCompanion<!>::foo
     }
 }
 
@@ -48,7 +48,7 @@ object C {
     }
 
     class Derived : Base() {
-        val a = <!UNRESOLVED_REFERENCE!>FromBaseCompanion<!>::<!UNRESOLVED_REFERENCE!>foo<!>
+        val a = <!UNRESOLVED_REFERENCE!>FromBaseCompanion<!>::foo
     }
 }
 
@@ -64,6 +64,6 @@ object D {
     }
 
     class Derived : Base() {
-        val a = <!UNRESOLVED_REFERENCE!>FromBaseCompanion<!>::<!UNRESOLVED_REFERENCE!>foo<!>
+        val a = <!UNRESOLVED_REFERENCE!>FromBaseCompanion<!>::foo
     }
 }