wifi: iwlwifi: mld: set wiphy::iftype_ext_capab dynamically

wifi: iwlwifi: mld: set wiphy::iftype_ext_capab dynamically

Instead of having a static const array for each possible combination of
features, build the extended capabilities dynamically.

With this we will also stop setting EHT capabilities when it might
actually be disabled.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250915113137.b3c03b56d5a3.I38eaf8ebaf3256e78b4643bef7e3a54aeb4989df@changeid