Provided HttpClient base urls

[bbowyersmyth]

Porting some code from Simple.OData.Client and having some issues with where to set the base url.

Only on the required ODataClientOptions object - Invalid request Uri exception

		var baseUrl = "https://services.odata.org/V4/Northwind/Northwind.svc";
		using var httpClient = new HttpClient();

		using var client = new ODataClient(new ODataClientOptions
		{ 
			BaseUrl = baseUrl,
			HttpClient = httpClient
		});

		var metadata = await client.GetMetadataAsync(cancellationToken: CancellationToken);

On both - Resource not found $metadata exception. (Works if the url ends in a slash)

		var baseUrl = "https://services.odata.org/V4/Northwind/Northwind.svc";
		using var httpClient = new HttpClient();
		httpClient.BaseAddress = new Uri(baseUrl);

		using var client = new ODataClient(new ODataClientOptions
		{ 
			BaseUrl = baseUrl,
			HttpClient = httpClient
		});

		var metadata = await client.GetMetadataAsync(cancellationToken: CancellationToken);

No httpclient provided - Works

		var baseUrl = "https://services.odata.org/V4/Northwind/Northwind.svc";

		using var client = new ODataClient(new ODataClientOptions
		{ 
			BaseUrl = baseUrl
		});

		// Act
		var metadata = await client.GetMetadataAsync(cancellationToken: CancellationToken);

If its a required property on ODataClientOptions it doesn't feel like HttpClient should need any configuration.