networkd: call link_set_routing_policy_rule before setting routes (#7815)

commit 7715629e (networkd: Fix race condition in [RoutingPolicyRule] handling (#7615)).
Does not fix race. Still there is a race in case of bride because the
bride goes down and up .

calling route_configure then link_set_routing_policy_rule and the
link_check_ready makes a race between routing_policy_rule_messages and route_messages.
While bride comes up and we call the call again route_configure if finds
it self in the callback function LINK_STATE_CONFIGURED networkd dies.
Let's handle first routing policy rules then route_configure. This fixes
the crash.
Closes #7797