Restructure the operator to separate config files

[mnecas]

Issues:

• We had multiple CSVs in the project.
• Some of the code was half generated half edited by hand.
• We had a config file with all RBAC rules which was not used in the CSV.

Summary of changes:

• Split the CSV to separate config files so we don't need to edit one large CSV. The config files contain the Kubernetes objects which are passed by the kustomize to operator SDK and then the bundle is created from it.
• The config files also contain some env variables which are replaced by envsubst before passing to operator SDK. These env vars can be used for example to set the different namespaces to the operator.
• Remove the bundle which should be used when doing the build. Now can be easily build with make bundle.
• Removal of custom build tools and replacement with a makefile.
• Add operator-sdk download to makefile.
• Some of the ansible templates were using old control-plane controller-manager which was renamed to forklift-operator.
• Update the GitHub workflows to build the bundle.

[mnecas]

Patch moved to https://github.com/kubev2v/forklift/pull/8