Create a debug builder on V8 for mac-arm64

Bug: chromium:1113183
Change-Id: Ie24412511c8eb29bdab14f0b4472c2741163e2fa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2352779
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69385}

infra/mb/mb_config.pyl

@@ -251,6 +251,7 @@
       'v8_win64_msvc_rel_ng': 'release_x64_msvc',
       'v8_win64_rel_ng': 'release_x64_trybot',
       'v8_mac_arm64_rel_ng': 'release_arm64',
+      'v8_mac_arm64_dbg_ng': 'debug_arm64',
       'v8_mac64_gc_stress_dbg_ng': 'debug_x64_trybot',
       'v8_mac64_rel_ng': 'release_x64_trybot',
       'v8_mac64_dbg': 'debug_x64',
@@ -401,6 +402,8 @@
       'debug_bot', 'arm64', 'android', 'minimal_symbols'],
     'debug_arm': [
       'debug_bot', 'arm', 'hard_float'],
+    'debug_arm64': [
+      'debug_bot', 'arm64'],
 
     # Release configs for arm.
     'release_arm': [

infra/testing/builders.pyl

@@ -637,6 +637,15 @@
       {'name': 'v8testing'},
     ],
   },
+  'v8_mac_arm64_dbg_ng_triggered': {
+    'swarming_dimensions' : {
+      'cpu': 'x86-64',
+      'os': 'Mac-10.13',
+    },
+    'tests': [
+      {'name': 'v8testing'},
+    ],
+  },
   ##############################################################################
   ### luci.v8.ci
   ##############################################################################