Add negative test case for addMissingConst codeFix with unexpected array elements

tests/cases/fourslash/codeFixAddMissingConstToArrayDestructuring4.ts

@@ -0,0 +1,5 @@
+/// <reference path='fourslash.ts' />
+
+////[x, y()] = [0, () => 1];
+
+verify.not.codeFixAvailable();