wifi: mac80211: kunit: generalize public action test

Generalize the test to be able to handle arbitrary
action categories and non-action frames, for further
test expansion.

Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://msgid.link/20231220151952.415232-5-benjamin@sipsolutions.net


Signed-off-by: Johannes Berg <johannes.berg@intel.com>