tests/int: use bfq test with rootless

As the rootless cgroup2 mount is now fixed, we can enable this test
for rootless as well.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

tests/integration/cgroups.bats

@@ -138,7 +138,8 @@ function setup() {
 }
 
 @test "runc run (blkio weight)" {
-	requires root cgroups_v2
+	requires cgroups_v2
+	[[ "$ROOTLESS" -ne 0 ]] && requires rootless_cgroup
 
 	set_cgroups_path
 	update_config '.linux.resources.blockIO |= {"weight": 750}'