wifi: iwlwifi: mvm: adjust some cleanup functions to MLO

Clean up data for all allocated links of a vif.
Invalidate all link sta pointers.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230328104949.948a7bee8b09.Ic6b202959c158258d391ccce77f66e1281879690@changeid


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