sefltests/bpf: Expand sockaddr hook deny tests

This patch expands test coverage for EPERM tests to include connect and
bind calls and rounds out the coverage for sendmsg by adding tests for
sendmsg_unix.

Signed-off-by: Jordan Rife <jrife@google.com>
Link: https://lore.kernel.org/r/20240510190246.3247730-16-jrife@google.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

Author: jrife