Change Mac on ARM64 builders to only perform v8testing

Bug: chromium:1126457
Change-Id: I9c5bc4d8d3ee8384642a6d2f9a8f1f821113eb97
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2401418Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Liviu Rau <liviurau@chromium.org>
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69885}

infra/testing/builders.pyl

@@ -632,32 +632,32 @@
   },
   'v8_mac_arm64_rel_ng_triggered': {
     'swarming_dimensions' : {
-      'cpu': 'x86-64',
-      'os': 'Mac-10.13',
+      'cpu': 'arm64',
+      'os': 'Mac-11',
+      'pool': 'chromium.tests.mac-arm64',
     },
     'tests': [
-      {'name': 'v8testing'},
-      {'name': 'test262'},
+      {'name': 'v8testing', 'variant': 'default'},
     ],
   },
   'v8_mac_arm64_dbg_ng_triggered': {
     'swarming_dimensions' : {
-      'cpu': 'x86-64',
-      'os': 'Mac-10.13',
+      'cpu': 'arm64',
+      'os': 'Mac-11',
+      'pool': 'chromium.tests.mac-arm64',
     },
     'tests': [
-      {'name': 'v8testing'},
-      {'name': 'test262'},
+      {'name': 'v8testing', 'variant': 'default'},
     ],
   },
   'v8_mac_arm64_full_dbg_ng_triggered': {
     'swarming_dimensions' : {
-      'cpu': 'x86-64',
-      'os': 'Mac-10.13',
+      'cpu': 'arm64',
+      'os': 'Mac-11',
+      'pool': 'chromium.tests.mac-arm64',
     },
     'tests': [
-      {'name': 'v8testing'},
-      {'name': 'test262'},
+      {'name': 'v8testing', 'variant': 'default'},
     ],
   },
   'v8_mac_arm64_sim_rel_ng_triggered': {