- Do not error out when deleting a non-existing namespace

- Stream command output to the GinkgoWriter in real-time as well

This allows following what happens when calling potentially long-running commands

- Implement airgap test mode

- Ignore error when creating a namespace that already exists

- Allow to use existing mirror registry in airgap scenario

- Extract constants for test modes

- Add documentation

- Find an easier way to determine the IMG variable, using the Makefile

- Add more examples to README.md

- Add note about clusters with hosted control planes

- Support k3d clusters

- Support Minikube clusters

- Load image into local clusters using an archive instead

This allows this logic to be agnostic to the container engine used to
build the image. We rely on the container image to export the image to
an archive ('{podman,docker} image save').

- Run E2E test nightly on main and release branch

… image

…operator image"

This reverts commit fc87e04.

If not, try to pull it automatically.
This would avoid having to manually pull it.

Co-authored-by: Gennady Azarenkov <gazarenkov@gmail.com>

Those are not used in production

…onfig is needed

On fresh clusters, 1 minute might be too short

…t kubeconfig is needed