net80211: update (parts of) Action field categories

Update to the full list of action field category values based on
802.11-2020 with 11ax extensions and remove one value Reserved nowadays.
While here annotate them with descriptions.

Also add Spectrum Management and Radio Measurement action field values
needed in LinuxKPI.

No functional changes.

Sponsored by: The FreeBSD Foundation
MFC after: 1 week