Python: Update Telemetry demo application to support multiple scenarios

[profreelancer222]

• [x] As a developer I can view the telemetry demo source code so that I can see how to configure telemetry using AppInsights or Aspire or Console output
• [x] As a developer I can run the telemetry demo for a chat completion scenario so that I can see what type of telemetry is being collected
• [x] As a developer I can run the telemetry demo for a function calling scenario so that I can see what type of telemetry is being collected
• [ ] As a developer I can run the telemetry demo for a vector store scenario so that I can see what type of telemetry is being collected
• [ ] As a developer I can run the telemetry demo for a text search scenario so that I can see what type of telemetry is being collected
• [ ] As a SK developer I can extend the telemetry demo for a custom scenario so that I can include new demoes that allow developer to view the telemetry for that scenario
• [x] As a developer I can find an article on the Learn Site which shows me how to understand the telemetry that is being collected for various scenarios

[TaoChenOSU]

Completed scenarios:

• Chat completion
• Function calling

Incomplete scenarios:

• Vector search
• Text search

Learn site has been updated for the completed scenarios.