Adds MAC ACL (whitelist/blacklist) read+write support for wireless SSIDs,
mirroring push_radio_channel's UCI write style. Backs the new Global MAC
ACL feature in netOrk.
'wifi reload' only reapplies the running config without physically
changing the channel on many ath9k/ath10k/mt76 hardware+driver
combinations. A full 'wifi' (down + up) cycle is required for channel
changes to take effect.
Also updated the test assertion accordingly.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>