[FR] API related to Registry Auth and Pod Templates.

[cblmemo]

Is your feature request related to a problem? Please describe.
I cannot fully control the RegistryAuth and Template using python API. The following features will be helpful:

1. RegistryAuth info retrieval:

• Get RegistryAuth id from its name (since it does not allow two RegistryAuth with the same name, I would assume the name can also serve as a unique identifier), or
• List all RegistryAuth (including id and name).

2. Delete Pod Template (from its id or name);
3. If using id to delete Pod Template, then Template info retrieval:

• Get Template id from its name (same, seems like RunPod does not allow duplicated name for templates as well), or
• List all Pod Template (including id and name).

Describe the solution you'd like
Implement the above API

Describe alternatives you've considered
I manually called the graphql api in python to delete the pod template. For info retrieval, i manually record it in local database and then retrieve it when used.

def delete_pod_template(template_name: str) -> None:
    """Deletes a pod template."""
    try:
        runpod.runpod.api.graphql.run_graphql_query(
            f'mutation {{deleteTemplate(templateName: "{template_name}")}}')
    except runpod.runpod.error.QueryError as e:
        logger.warning(f'Failed to delete template {template_name}: {e}'
                       'Please delete it manually.')

Additional context
Implement those API would greatly enhance the experience for using runpod python SDK 🚀