Add workshop that includes span links

[dmitchsplunk]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
We'd like a workshop that gives customers and prospects an opportunity to see OpenTelemetry span links "in action" in Splunk Observability Cloud.

Describe alternatives you've considered
We considered adding span links to one of the existing demo environments, but neither the Google Microservices (Hipster Shop) app nor the OpenTelemetry demo (Astronomy Shop) app include span links. Since this isn't something that needs to be continuously demoed, a workshop would be best.

Additional context
Add any other context or screenshots about the feature request here.