Update grafana slicing dashboard

[pirog-spb]

I'm, as a slicing promoter, show slicing demo using grafana dashboards where monitoring parameters are shown per slice separatly.

Acceptance criteria:

• [x] Every monitoring parameter is shown per slice if possible
• [x] Dynamical panel per slice supported
• [ ] Updated dashboard reviewed
• [ ] Source code of dashboard merged in repo
• [ ] Dashboard deployed in K8s demo stand

[PapaySail]

Row options

Title S-NSSAI $snssai Repeat for snssai

Panel SMF query A : ues_active and on(job) fivegs_smffunction_sm_sessionnbr{snssai="$snssai"} filter for SMF related to $snssai only refer to https://stackoverflow.com/questions/63660751/nesting-query-in-promql#63667762

Selecting all instances with a particular label can be done with the and operator, which will return the left hand side if the labels on the right hand side has matching labels.

dashboard looks like:

Update open5gs_sessions.json https://github.com/edgecomllc/eupf/pull/442