RequestBuilder should not add QueryParameters in the final URI if they are null or empty

[Licantrop0]

issue #196 is representing in the Kiota-generated SDK.

Executing this:
var users = await _graphClient.Users.GetAsync(rc => rc.QueryParameters.Search = "")

will result in an error.

[andrueastman]

Thanks for this @Licantrop0

This should be investigated and solved via microsoft/kiota-dotnet#60 so we'll close this and track it from there.