selftests/bpf: Expand ATTACH_REJECT tests

This expands coverage for ATTACH_REJECT tests to include connect_unix,
sendmsg_unix, recvmsg*, getsockname*, and getpeername*.

Signed-off-by: Jordan Rife <jrife@google.com>
Link: https://lore.kernel.org/r/20240510190246.3247730-18-jrife@google.com


Signed-off-by: Alexei Starovoitov <ast@kernel.org>