BUILD-191: add e2e tests

[gabemontero]

/assign @coreydaley

this should over the scenarios discussed in the README

my thought is that once we've reviewed / iterate / merge, possible next steps:

1. go ahead and craft "interim" PRs in openshift/release to see if PR test jobs will work where the deploy via ./deploy/deploy.sh works in CI
2. then circle back with the OLM work in BUILD-159 and integrate / install via that form

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[coreydaley]

/lgtm