Add DDOS metrics
The following new metrics have been added: ddos_action_limit_streams_connections, ddos_action_limit_streams_requests, ddos_action_tarpit_accept, ddos_action_tarpit, ddos_action_close, and ddos_action_blackhole.
Prior change: Change config store casing to be consistent with other stores
Following change: Add NGWAF and Compute Origin Inspector metrics
