test(integration): Add on-premise integration tests

[BYK]

Depends on getsentry/self-hosted#602

[untitaker]

will this block deploys or add to the run time? or is this a separate/parallel job?

[BYK]

will this block deploys or add to the run time? or is this a separate/parallel job?

If this test fails, we won't publish the image to Docker Hub. I'd also like to make this check required after this.

[jan-auer]

If this test fails, we won't publish the image to Docker Hub.

@BYK Please publish the image regardless. We can make the check required, but ops needs a way to deploy commits even if tests are failing for whatever reason. We've had situations in the past where we needed to fast-track emergency bugfixes to Relay even though Sentry or other services were broken at the time.

[BYK]

This only blocks Docker Hub pushes. The image is always available on us.gcr.io/sentryio/relay as that's the image we use to test on-premise here.

[jan-auer]

That's perfect, thanks for clarifying!