Add "test262" to mac_arm64 bots

Bug: chromium:1113183
Change-Id: I0715257b5e929ae6877e1d031138ec24d2789c29
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2358732Reviewed-by: Liviu Rau <liviurau@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69431}

infra/testing/builders.pyl

@@ -635,6 +635,7 @@
     },
     'tests': [
       {'name': 'v8testing'},
+      {'name': 'test262'},
     ],
   },
   'v8_mac_arm64_dbg_ng_triggered': {
@@ -644,6 +645,7 @@
     },
     'tests': [
       {'name': 'v8testing'},
+      {'name': 'test262'},
     ],
   },
   'v8_mac_arm64_full_dbg_ng_triggered': {
@@ -653,6 +655,7 @@
     },
     'tests': [
       {'name': 'v8testing'},
+      {'name': 'test262'},
     ],
   },
   ##############################################################################