selftests/bpf: Replaces the usage of CHECK calls for ASSERTs in bind_perm

bind_perm uses the `CHECK` calls even though the use of
ASSERT_ series of macros is preferred in the bpf selftests.

This patch replaces all `CHECK` calls for equivalent `ASSERT_`
macro calls.

Signed-off-by: Yuran Pereira <[e-mail]>
Signed-off-by: Andrii Nakryiko <[e-mail]>
Link: https://lore.kernel.org/bpf/[e-mail]

tools/testing/selftests/bpf/prog_tests/bind_perm.c

···
 #include "cap_helpers.h"
 #include "bind_perm.skel.h"
 
-static int duration;
-
 static int create_netns(void)
 {
 	if (!ASSERT_OK(unshare(CLONE_NEWNET), "create netns"))
···
 	int fd = -1;
 
 	fd = socket(family, SOCK_STREAM, 0);
-	if (CHECK(fd < 0, "fd", "errno %d", errno))
+	if (!ASSERT_GE(fd, 0, "socket"))
 		goto close_socket;
 
 	if (family == AF_INET) {
···
 		return;
 
 	cgroup_fd = test__join_cgroup("/bind_perm");
-	if (CHECK(cgroup_fd < 0, "cg-join", "errno %d", errno))
+	if (!ASSERT_GE(cgroup_fd, 0, "test__join_cgroup"))
 		return;
 
 	skel = bind_perm__open_and_load();