Use sentry.datum.net

[ecv]

The cloud-portal reaches out to sentry.prod.env.datum.net, which is chill enough.

But sentry.datum.net is a proxy created for the purpose of fronting this service name.

Acceptance Criteria

The cloud-portal console reaches out for Sentry at sentry.datum.net, not sentry.prod.env.datum.net.

Edit mentions of sentry.prod.env.datum.net to be sentry.datum.net throughout the codebase.

[scotwells]

FYI the proxy exists but our sentry instance hasn't actually been setup to support this yet.

[ecv]

This might fix a thing where users w/ adblock don't get tracked by Sentry.