message: Add new try builder configs to mb_config.pyl.
  TBR=titovartem@webrtc.org
  Cr-Commit-Position: refs/heads/master@{#32557}
diff: 'ios_compile_arm_rel': 'ios_release_bot_arm',
  'ios_compile_arm64_dbg': 'ios_debug_bot_arm64',
  'ios_compile_arm64_rel': 'ios_release_bot_arm64',
  - 'ios_sim_x64_dbg_ios10': 'ios_debug_bot_x64',
  - 'ios_sim_x64_dbg_ios11': 'ios_debug_bot_x64',
  'ios_sim_x64_dbg_ios12': 'ios_debug_bot_x64',
  + 'ios_sim_x64_dbg_ios13': 'ios_debug_bot_x64',
  + 'ios_sim_x64_dbg_ios14': 'ios_debug_bot_x64',
  # Mac
  'mac_compile_dbg': 'debug_bot_x64',
  