[Breakdown] AppConfiguration GetSnapshot

[ahsonkhan]

• Sample building with expected design
• Sample running
• Readme doc
• (optional) Hand-written SDK matches expected design
• Live Tests
• Recorded Tests
• Generated code matches expected design

https://github.com/Azure/azure-rest-api-specs/blob/b6bead0df961af706e984e2b9807c8a099ece61b/specification/appconfiguration/AppConfiguration/routes.tsp#L503

https://learn.microsoft.com/en-us/azure/azure-app-configuration/rest-api-snapshot?pivots=v23-11#get-snapshot

There are two scenarios here:
GetSnapshot and GetSnapshot (conditional)