[FIR-TEST] Update testdata of old frontend tests

compiler/testData/diagnostics/tests/smartCasts/safecalls/safeAccessReceiverNotNull.fir.kt

@@ -7,7 +7,7 @@
 fun kt6840_1(s: String?) {
     val hash = s?.hashCode()
     if (hash != null) {
-        s.<!INAPPLICABLE_CANDIDATE!>length<!>
+        s.length
     }
 }
 
@@ -42,8 +42,8 @@ fun kt4565_1(a: SomeClass?) {
     val data = a?.data
     if (data != null) {
         data.hashCode()
-        a.<!INAPPLICABLE_CANDIDATE!>hashCode<!>()
-        a.<!INAPPLICABLE_CANDIDATE!>data<!>.<!UNRESOLVED_REFERENCE!>hashCode<!>()
+        a.hashCode()
+        a.data.hashCode()
     }
     if (a?.data != null) {
         // To be supported (?!)
@@ -52,7 +52,7 @@ fun kt4565_1(a: SomeClass?) {
         a.data.hashCode()
     }
     if (a?.data is String) {
-        a.<!INAPPLICABLE_CANDIDATE!>data<!>.<!UNRESOLVED_REFERENCE!>length<!>
+        a.data.length
         data.length
     }
 }