[MB][test] Add configs for new mac-arm64 builders

NOTRY=true

Bug: chromium:1126457
Change-Id: I08df6070586cdc435595ddda74e1e8cfe2abf2b7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2401423
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Liviu Rau <liviurau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69863}

infra/mb/mb_config.pyl

@@ -75,6 +75,7 @@
       'V8 Mac64 - debug': 'debug_x64',
       'V8 Mac64 GC Stress': 'debug_x64',
       'V8 Mac64 ASAN': 'release_x64_asan_no_lsan',
+      'V8 Mac - arm64 - release builder': 'release_arm64',
       # Sanitizers.
       'V8 Linux64 ASAN': 'release_x64_asan',
       'V8 Linux64 TSAN - builder': 'release_x64_tsan',

infra/testing/builders.pyl

@@ -1241,6 +1241,21 @@
       {'name': 'd8testing', 'test_args': ['--gc-stress'], 'shards': 4},
     ],
   },
+  'V8 Mac - arm64 - release': {
+    'swarming_dimensions' : {
+      'os': 'Mac-11',
+      'cpu': 'arm64',
+      'pool': 'chromium.tests.mac-arm64',
+    },
+    'swarming_task_attrs': {
+      'expiration': 14400,
+      'hard_timeout': 3600,
+      'priority': 35,
+    },
+    'tests': [
+      {'name': 'd8testing', 'variant': 'default'},
+    ],
+  },
   'V8 Win32': {
     'swarming_dimensions': {
       'cpu': 'x86-64',