rm_templates: T8609: route_maps.py: fix remaining trailing *$ patterns

Five sites in route_maps.py still had the (?P<name>...)\n *$ shape that collapses to (?P<name>...)*$ under re.VERBOSE, parsers sequence, on_match_next, set_atomic_aggregate, set_extcommunity_bandwidth_non_transitive, and match_community_exact_match. Collapsed each to \s*$ on the same line as the named group, matching the rest of the PR.