Expanding navigation properties on alternate keys

Related to https://github.com/microsoftgraph/msgraph-sdk-dotnet/issues/2243

From the documentation at https://learn.microsoft.com/en-us/graph/api/directoryrole-list-members?view=graph-rest-1.0&tabs=http#example-2-get-the-members-of-a-directory-role-using-roletemplateid

It should be possible to list the members of a directoryRole using id or using the roleTemplateId alternate key.

GET /directoryRoles/{role-id}/members
GET /directoryRoles(roleTemplateId='{roleTemplateId}')/members

At moment we do not expand paths with alternate keys even though they may have contained navigation properties. As these maybe be valid paths, we will need to investigate the validity and impact on path expansion across other paths.

未指定文件或测试。首先定位 path-expansion logic，并将 id path 的 navigation-property expansion 与 alternate-key directoryRole examples 进行比较；然后评估其在其他 paths 上的有效性和影响。完成的标准是：已定义受支持的 alternate-key navigation paths，并通过适当的验证覆盖它们。