Integrate gcloud setup workflows for ViUR projects

[phorward]

This issue is a collection currently resolved in several scripts, which should be merged into viur-cli under a uniform interface / command, e.h. viur-cli maintain.

• viur-cli setup all should perform the operations from viur-gcloud-setup.sh
• viur-cli setup backup for enable-backup.sh should be integrated into the setup process as well #70
• viur-cli setup index for index.yaml sorting and deployment (see Integrate tool for sorting index.yaml file #2 as well, maybe can be integrated with this)
• viur-cli setup queue for queue.yaml deployment
• viur-cli setup cron for cron.yaml deployment
• viur-cli setup cicd for setting-up and update CI/CD workflows

[Grashalmbeisser]

The operations from viur-gcloud-setup.sh is handled in the new cloud.py.

The Base for CiCd is Pr'd in viur-framework/viur-base#125 and wont be fixed in the CLI for now

The issue should be closed after #98