Agora patches

[sebassem]

• Remove the use of Service Principal only in Contoso Hypermarket
• Added K8s secrets (AI services, EventHub, SQL)
• Remove Azure Container registry from Contoso Hypermarket
• Added a Load balancer and updated the NSG rules
• Added an optional parameter for deploying GPU worker nodes
• Added GitOps configuration invocation and some bug fixes

[microsoft-github-policy-service[bot]]

Hi sebassem! Thank you for opening this Pull Request. Someone will review it soon. Thank you for committing to making the Arc Jumpstart better.