Fixes: #9457

Description
This one removes the dependency Skaffold has with gsutil CLI implementing only the functionalities that we are using:

• Download recursive content from a bucket, supporting wildcards: we should be behaving the same as the gsutil CLI, covering different weird cases and supporting the same syntax
• Upload one single file to a bucket, not supporting wildcards

We now uses the Cloud client libraries for this. The affected use cases are the following:

• Download a remote dependency from GCS
• Save the result of a render in a bucket
• Read rawManifests from GCS. This last one, even though the logic is there, Skaffold throws an error if we try to do it.