In lieu of #283, implement Stackdriver Canary Analysis for use in GKE.

We sanitize secrets when they arrive at the cache layer (https://github.com/projectcontour/contour/blob/main/internal/dag/secret.go#L34:6), however, that logic is duplicated in the dag package (https://github.com/projectcontour/contour/blob/main/internal/dag/accessors.go#L225).

I theory we should be able to rely on the secrets being valid from the cache bit, but in any case should centralize t

Currently this system's modes are changed only when contours are appeared above the icon area but it will not always be best idea. So if anyone can train a Gesture Recognition model and then assign a mode then this will add real aid.
Thanks.

Currently, the dex and gangway config files must be updated manually.

Automate this replacement. Perhaps use a templating system, ideally something less heavy-weight than helm.

Please describe the problem you have

In e2e test, HTTPRoute's status is not verified after it was created.

e.g.
https://github.com/projectcontour/contour-operator/blob/fd7f2b3717443bc0ca0d1c496ed5d4d6cd50e513/test/e2e/operator_test.go#L544-L547

The test should verify the ConditionRouteAdmitted status.