Refactor manifests and manifest generation

[everettraven]

Currently there are a lot of manual changes that need to be made with the manifests (mostly related to RBAC) as the controller and API implementations are modified. We should probably try to use kustomize to make this process as automated as possible (i.e just have to run a make target)

The Operator-SDK testdata could be used as a reference to understand how the end result of this refactor could look:

• Manifests directory: https://github.com/operator-framework/operator-sdk/tree/master/testdata/go/v3/memcached-operator/config
• Makefile targets for manifest generation: https://github.com/operator-framework/operator-sdk/blob/484013d1865c35df2bc5dfea0ab6ea6b434adefa/testdata/go/v3/memcached-operator/Makefile#L88-L94