pybind/ceph_daemon: add 10s timeout to admin socket client

pybind/ceph_daemon: add 10s timeout to admin socket client

ceph daemon command can hangs indefinitely when the target
daemon's admin socket is unresponsive. do_sockio() creates socket with
no timeout, so sock.recv(4) blocks forever if the daemon is slow to respond,
where AdminSocket::init() creates the socket file before store->mount()
returns).

The AdminSocketClient already uses a 10-second SO_RCVTIMEO / SO_SNDTIMEO.
Align the Python client by calling sock.settimeout(timeout) before connecting.
The default is 10s to match the C++ side; callers can pass timeout=None
to restore the previous blocking behaviour.

Fixes: https://tracker.ceph.com/issues/77743
Signed-off-by: Nitzan Mordechai <nmordech@ibm.com>