team: replace team lock with rtnl lock

syszbot reports various ordering issues for lower instance locks and
team lock. Switch to using rtnl lock for protecting team device,
similar to bonding. Based on the patch by Tetsuo Handa.

Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by:  <syzbot+705c61d60b091ef42c04@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=705c61d60b091ef42c04


Reported-by:  <syzbot+71fd22ae4b81631e22fd@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=71fd22ae4b81631e22fd
Fixes: 6b1d3c5f ("team: grab team lock during team_change_rx_flags")
Link: https://lkml.kernel.org/r/ZoZ2RH9BcahEB9Sb@nanopsycho.orion


Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20250623153147.3413631-1-sdf@fomichev.me


Signed-off-by: Jakub Kicinski <kuba@kernel.org>