Ensure that qubesdb SELinux labels are correct

/usr/sbin is now considered an alias for /usr/bin, so include rules for
/usr/bin to ensure correct labelling.  Do not remove the old rules to
avoid regression on Fedora 40.

Part-of: QubesOS/qubes-issues#9663

selinux/qubes-core-qubesdb.fc

@@ -1,3 +1,4 @@
 /usr/sbin/qubesdb-daemon     -- gen_context(system_u:object_r:qubes_qubesdb_daemon_exec_t,s0)
+/usr/bin/qubesdb-daemon      -- gen_context(system_u:object_r:qubes_qubesdb_daemon_exec_t,s0)
 /run/qubes/qubesdb\.sock     -s gen_context(system_u:object_r:qubes_qubesdb_socket_t,s0)
 /var/run/qubes/qubesdb\.sock -s gen_context(system_u:object_r:qubes_qubesdb_socket_t,s0)