pf tests: Re-enable panicing tests

We've fixed the vnet/epair cleanup race, so it is now safe to re-enable these
tests.

MFC after:	2 weeks
Sponsored by:	Modirum MDPay

tests/sys/netpfil/pf/names.sh

@@ -36,7 +36,6 @@ names_head()
 
 names_body()
 {
-	atf_skip "Kernel panics when flushing epair queue (bug238870)"
 	pft_init
 
 	epair=$(vnet_mkepair)

tests/sys/netpfil/pf/nat.sh

@@ -36,10 +36,6 @@ exhaust_head()
 
 exhaust_body()
 {
-	if [ "$(atf_config_get ci false)" = "true" ]; then
-		atf_skip "https://bugs.freebsd.org/244703"
-	fi
-
 	pft_init
 
 	epair_nat=$(vnet_mkepair)

tests/sys/netpfil/pf/synproxy.sh

@@ -36,7 +36,6 @@ synproxy_head()
 
 synproxy_body()
 {
-	atf_skip "Kernel panics when flushing epair queue (bug238870)"
 	pft_init
 
 	epair=$(vnet_mkepair)