Fix RELATED_IMAGE overrides for containers in cluster deployment

The RELATED_IMAGE variables for containers in the cluster deployment
were not being respected. This commit fixes it to ensure that
they can be overriden.

Issue: [ch8302]

Fix RELATED_IMAGE overrides for containers in cluster deployment

The RELATED_IMAGE variables for containers in the cluster deployment
were not being respected. This commit fixes it to ensure that
they can be overriden.

Issue: [ch8302]

Update Gopkg.lock

Follow-up to 2f1e0d3

Default registry to registry.developers.crunchydata.com/crunchydata

Issue: [ch7977]

Change default watched namespace to "pgo" with pgo-deployer

This had multiple namespaces, but for the default install we just
want to have one.

Update pgo client reference documentation

This includes the commands for the pgAdmin functionality.

Update the autogenerated documentation for the commands

This is the usual pre-release run.

Operator Upgrade Documentation Updates

This updates the current upgrade documentation to reflect the
changes made to the Operator upgrade procedure and removes
the instructions related to the previous upgrade procedures
that are no longer valid.

Remove "backoffLimit" from Jobs

This reverts to using the Kubernetes default (6), and ensures that
any jobs have a restartPolicy of "Never" due to language in the Kubernetes
docs.

Ensure container resources file is synced across installers

...with a personal hope that having the new installer container will
limit the need for these kinds of commits.