Enabling invenio-cli services setup inside k8s

[mesemus]

Description

invenio-cli services setup currently can not be used in k8s, as it will try to instantiate a docker client even if --no-services is passed and the instantiation will fail. This happens inside the DockerHelper constructor where self.docker_client = docker.from_env() is called.

This PR fixes this issue by adding a NoOp implementation of DockerHelper that is used if --no-services are specified.

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[fenekku]

LGTM. Merging.