Add support for PUT operations based on annotations

[irvinesunday]

We need to start supporting PUT operations for entity sets and navigation properties based on the annotated Http method in the UpdateMethod property of Org.OData.Capabilities.V1.UpdateRestrictions annotation for a given target element. See: https://github.com/oasis-tcs/odata-vocabularies/blob/053724df1ab5d19cc198f2a52cf8a85a2be08d79/vocabularies/Org.OData.Capabilities.V1.xml#L676-L677

Assemblies affected

Microsoft.OpenApi.OData.Reader

Steps to reproduce

Using the GUI tool, generate an OpenAPI doc. from CSDL that has the PUT value annotated in the UpdateMethod property in the Org.OData.Capabilities.V1.UpdateRestrictions annotation for a given target element.

Expected result

PUT operation generated for this target element.

Actual result

The default PATCH operation is generated.