Add array destructure tests

Author: Andy Hanson

tests/cases/fourslash/codeFixUnusedIdentifier_destructure_partlyUnused.ts

@@ -10,6 +10,14 @@
 ////    const { x, y } = o;
 ////    y;
 ////}
+////{
+////    const [x, y] = o;
+////    x;
+////}
+////{
+////    const [x, y] = o;
+////    y;
+////}
 
 verify.codeFixAll({
     fixId: "unusedIdentifier_delete",
@@ -22,5 +30,13 @@ verify.codeFixAll({
 {
     const { y } = o;
     y;
+}
+{
+    const [x] = o;
+    x;
+}
+{
+    const [y] = o;
+    y;
 }`,
 });