Low: controller: Reduce CIB deletions during reprobe

Currently in force_reprobe() we delete each resource's history from the
CIB via delete_resource() -> delete_rsc_entry(), and then we delete the
entire node's resource history (lrm section) via
controld_delete_node_state(). Deleting the whole node resource history
makes the individual resource deletions redundant. We can avoid those
and their associated overhead.

Closes T219

Signed-off-by: Reid Wahl <nrwahl@protonmail.com>