re-enable scheduled pipelines for git cache and migrate to the new s3 server

The git-cache scheduled pipeline was not working for a while, fix this in the first commit.

The minio server we currently have is going to be unavailable on Nov 30th. We need to migrate to a new one, and I have set up a new S3 server with some slight differences. The main benefits are data redundancy and probably faster networking.

However, I need others to chime in and ensure that the new server is working as expected before we merge this.