message: Add specific mac arm64 mb config
  Trying to solve
  Cr-Commit-Position: refs/heads/main@{#36837}
diff: 'Perf Linux Bionic': 'release_bot_x64',
  'Perf Linux Trusty': 'release_bot_x64',
  'Perf Mac 11': 'release_bot_x64',
  - 'Perf Mac M1 Arm64 12': 'release_bot_arm64',
  + 'Perf Mac M1 Arm64 12': 'linux_mac_crosscompile_arm64',
  'Perf Win7': 'release_bot_x64',
  },
  'internal.client.webrtc': {
  'libfuzzer', 'asan', 'optimize_for_fuzzing', 'openh264',
  'pure_release_bot', 'x64'
  ],
  + 'linux_mac_crosscompile_arm64': [
  + 'release_bot',
  + 'arm64',
  + 'mac',
  + ],
  'mac_asan_clang_release_bot_x64': [
  'asan',
  'clang',
  'lsan': {
  'gn_args': 'is_lsan=true',
  },
  + 'mac': {
  + 'gn_args': 'target_os="mac"'
  + },
  'minimal_symbols': {
  'gn_args': 'symbol_level=1',
  },
  