team: Add matching error label for failed action

team: Add matching error label for failed action

Follow the "action" - "err_action" pairing of labels
found across the source code of team net device.

Currently in team_port_add the err_set_slave_promisc
label is reused for exiting on error when setting
allmulti level of the new slave.

Signed-off-by: Nikola Z. Ivanov <zlatistiv@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20251128072544.223645-1-zlatistiv@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>