* 2 new Network Functions:
* NWDAF
* UPF: we are obsoleting `openair-spgwu-tiny` in favor of 5G-only UPF implementation
- It supports 2 implementations:
* The `Simple-Switch` from `openair-spgwu-tiny`
* An `eBPF`-based solution
* Tutorials:
* All tutorials are now using `oai-upf` instead of `openair-spgwu-tiny`
* New tutorials:
- Mongo-DB for User Subscription management (instead of mysql) example
- A traffic steering example
- A traffic redirection example
- UPF simple example using the eBPF implementation
- NWDAF simple example
* Helm Charts:
* All charts are now using `oai-upf` instead of `openair-spgwu-tiny`
* Removed the use of `helm-spray`
* Charts updated to latest YAML configuration scheme