Increase visibility in the dev e2e suite to help improve debuggability

Summary: The e2e suite currently tests most of the behavior that we're trying to support during this initial phase. Occasionally, we'll see test case failures that are difficult/impossible to debug without seeing the current state of the PlatformOperator/BundleDeployment/etc. resources.

Goal: Improve the visibility into individual test case failures when running the e2e suite in CI. Introduce some mechanism that outputs the YAML representation of relevant resources when a test case fails.

Downstream mirror for https://github.com/openshift/platform-operators/issues/56.