[MB] Add a Mac-on_arm compile only trybot

Bug: chromium:1126457
Change-Id: I3faa690d8b5d1fefcba7b75c38fb5d2c8570c3aa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2707165Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72916}

infra/mb/mb_config.pyl

@@ -240,6 +240,7 @@
       'v8_mac_arm64_rel_ng': 'release_arm64',
       'v8_mac_arm64_dbg_ng': 'debug_arm64',
       'v8_mac_arm64_full_dbg_ng': 'full_debug_arm64',
+      'v8_mac_arm64_compile_rel': 'release_arm64',
       'v8_mac_arm64_sim_rel_ng': 'release_simulate_arm64_trybot',
       'v8_mac_arm64_sim_dbg_ng': 'debug_simulate_arm64',
       'v8_mac_arm64_sim_nodcheck_rel_ng': 'release_simulate_arm64',