Migration from old release management to YAML deployments

[baywet]

To prepare for our migration to 1es templates, we need to first migrate off the old release management (JSON) to the newer YAML deployments for the following definitions:

• msgraph-beta-sdk-dotnet.preview
• msgraph-sdk-dotnet.production
• msgraph-sdk-dotnet-core.preview
• msgraph-sdk-dotnet-core.production (merge this one with the previous)

here is an example of how it's done in kiota abstractions

once the migration is done, we should disable the older definitions

[andrueastman]

Closing this one for now as this is now resolved via Core - https://github.com/microsoftgraph/msgraph-sdk-dotnet-core/pull/810 V1 - https://github.com/microsoftgraph/msgraph-sdk-dotnet/pull/2370 Beta - https://github.com/microsoftgraph/msgraph-beta-sdk-dotnet/pull/810