Remove spring cloud dependency

Spring cloud seems to be entirely unused except the fabric8 kubernetes client, which is already transitively depended on. This MR removes the spring cloud dependency completely and replaces it with a direct dependency on the fabric8 kubernetes client.

This also fixes various error messages being thrown by the discovery client when using cridge for a remote cluster management.

I've tested that this works on both a 1.32 and 1.33 kubernetes cluster.

Closes #23 (closed)