[FIR] Unbound aliased variables in DFA more carefully

compiler/testData/diagnostics/tests/smartCasts/varnotnull/boundInitializer.fir.kt

@@ -15,6 +15,6 @@ fun foo(arg: Int?) {
     var z = arg
     z = z?.let { 42 }
     if (z != null) {
-        arg.<!INAPPLICABLE_CANDIDATE!>hashCode<!>()
+        arg.hashCode()
     }
 }

compiler/testData/diagnostics/tests/smartCasts/varnotnull/boundInitializerWrong.fir.kt

@@ -23,7 +23,7 @@ fun bar(s: String?) {
     val hashCode = ss?.hashCode()
     ss = null
     if (hashCode != null) {
-        ss.<!INAPPLICABLE_CANDIDATE!>hashCode<!>()
+        ss.<!UNRESOLVED_REFERENCE!>hashCode<!>()
     }
 }
 

compiler/testData/diagnostics/tests/smartCasts/varnotnull/plusplusMinusminus.fir.kt

@@ -2,7 +2,7 @@
 fun foo(arg: Int?): Int {
     var i = arg
     if (i != null && i++ == 5) {
-        return i<!INAPPLICABLE_CANDIDATE!>--<!> + i
+        return i-- + i
     }
     return 0
 }