net-mgmt/victoria-metrics: port had been improved (+)

Add missing run-time dependency on `security/ca_root_nss': apparently,
every Go application that uses TLS needs root CA certificates installed
in the default place, which are used for verifying signatures provided
by peers during establishing TLS connections.

While here, remove accidental reference to `cbsd_mq_router_config' in
the rc script and allow to reload (scrape) configuration by sending
SIGHUP to processes.

PR: 255822