NET5 ASP.Net Core and OData 8.0 Versioning

OData 8.0 worked prototype with versioning and different edm models for different api versions

Based on

• https://devblogs.microsoft.com/odata/api-versioning-extension-with-asp-net-core-odata-8/
• https://devblogs.microsoft.com/odata/asp-net-odata-8-0-preview-for-net-5/
• https://devblogs.microsoft.com/odata/attribute-routing-in-asp-net-core-odata-8-0-rc/