ipvs: use more counters to avoid service lookups

ipvs: use more counters to avoid service lookups

When new connection is created we can lookup for services multiple
times to support fallback options. We already have some counters
to skip specific lookups because it costs CPU cycles for hash
calculation, etc.

Add more counters for fwmark/non-fwmark services (fwm_services and
nonfwm_services) and make all counters per address family.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Florian Westphal <fw@strlen.de>
Link: https://patch.msgid.link/20260224205048.4718-6-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>