Fix issues in async generator case files

Incorrect $DONE handlers which led to calling $DONE twice
- async-generators/yield-promise-reject-next-yield-star-async-iterator.case
- dstr-assignment-for-await/array-elem-trlg-iter-rest-nrml-close-skip.case

$DONE handler not called at all:
- dstr-assignment-for-await/array-elem-put-const.case
- dstr-assignment-for-await/array-elem-trlg-iter-elision-iter-nrml-close-null.case

Incorrect assumed execution sequence in IteratorDestructuringAssignmentEvaluation:
- dstr-assignment-for-await/array-elem-iter-rtrn-close-null.case

src/async-generators/yield-promise-reject-next-yield-star-async-iterator.case

@@ -28,4 +28,4 @@ iter.next().then(() => {
     assert.sameValue(done, true, "The value of IteratorResult.done is `true`");
     assert.sameValue(value, undefined, "The value of IteratorResult.value is `undefined`");
   }).then($DONE, $DONE);
-}).then($DONE, $DONE);
+}, $DONE).catch($DONE);

src/dstr-assignment-for-await/array-elem-iter-rtrn-close-null.case

@@ -4,6 +4,12 @@
 desc: >
     IteratorClose throws a TypeError when `return` returns a non-Object value
 info: |
+    AssignmentElement : DestructuringAssignmentTarget Initializer
+    1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an ArrayLiteral, then
+      a. Let lref be the result of evaluating DestructuringAssignmentTarget.
+      b. ReturnIfAbrupt(lref).
+    [...]
+
     ArrayAssignmentPattern : [ AssignmentElementList ]
 
     [...]
@@ -43,7 +49,12 @@ iterable
 //- body
 unreachable += 1;
 //- teardown
-iter.next().then(() => $DONE('Promise incorrectly fulfilled.'), ({ constructor }) => {
-  assert.sameValue(unreachable, 0);
-  assert.sameValue(constructor, TypeError);
-}).then($DONE, $DONE);
+iter.next().then(result => {
+  assert.sameValue(result.value, undefined);
+  assert.sameValue(result.done, false);
+
+  iter.return().then(() => $DONE('Promise incorrectly fulfilled.'), ({ constructor }) => {
+    assert.sameValue(unreachable, 0);
+    assert.sameValue(constructor, TypeError);
+  }).then($DONE, $DONE);
+}, $DONE).catch($DONE);

src/dstr-assignment-for-await/array-elem-put-const.case

@@ -15,3 +15,8 @@ const c = null;
 [ c ]
 //- vals
 [1]
+//- teardown
+promise.then(() => $DONE('Promise incorrectly fulfilled.'), ({ constructor }) => {
+  assert.sameValue(iterCount, 0);
+  assert.sameValue(constructor, TypeError);
+}).then($DONE, $DONE);

src/dstr-assignment-for-await/array-elem-trlg-iter-elision-iter-nrml-close-null.case

@@ -57,3 +57,9 @@ TypeError
 [ x , , ]
 //- vals
 iterable
+//- teardown
+promise.then(() => $DONE('Promise incorrectly fulfilled.'), ({ constructor }) => {
+  assert.sameValue(iterCount, 0);
+  assert.sameValue(nextCount, 2);
+  assert.sameValue(constructor, TypeError);
+}).then($DONE, $DONE);

src/dstr-assignment-for-await/array-elem-trlg-iter-rest-nrml-close-skip.case

@@ -52,4 +52,4 @@ iter.next().then(() => {
     assert.sameValue(x, 1, 'x');
     assert.sameValue(y.length, 0, 'y.length');
   }).then($DONE, $DONE);
-}).then($DONE, $DONE);
+}, $DONE).catch($DONE);