[FIR] Fix tests (ARGUMENT_TYPE_MISMATCH instead of INCOMPATIBLE_CANDIDATE)

compiler/testData/diagnostics/tests/dataFlowInfoTraversal/ArrayAccess.fir.kt

@@ -4,10 +4,10 @@ fun foo() {
     val x: Int? = null
     val a = Array<Int>(3, {0})
 
-    if (x != null) bar(a[x]) else bar(<!INAPPLICABLE_CANDIDATE!>a[x]<!>)
+    if (x != null) bar(a[x]) else bar(a[<!ARGUMENT_TYPE_MISMATCH!>x<!>])
     bar(a[if (x == null) 0 else x])
-    bar(<!INAPPLICABLE_CANDIDATE!>a[x]<!>)
-    
-    <!INAPPLICABLE_CANDIDATE!>"123"[x]<!>;
+    bar(a[<!ARGUMENT_TYPE_MISMATCH!>x<!>])
+
+    "123"[<!ARGUMENT_TYPE_MISMATCH!>x<!>];
     if (x != null) "123"[x];
 }