Fix browser cookie tests to only run with HTTPS (#39665)

Author: BrennanConroy

src/SignalR/clients/ts/FunctionalTests/EchoConnectionHandler.cs

@@ -4,21 +4,11 @@
 using System.Buffers;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Connections;
-using Microsoft.AspNetCore.Http.Connections;
 
 namespace FunctionalTests
 {
     public class EchoConnectionHandler : ConnectionHandler
     {
-        public override async Task OnConnectedAsync(ConnectionContext connection)
-        {
-            var context = connection.GetHttpContext();
-            // The 'withCredentials' tests wont send a cookie for cross-site requests
-            if (!context.WebSockets.IsWebSocketRequest && !context.Request.Cookies.ContainsKey("testCookie"))
-            {
-                return;
-            }
-
             while (true)
             {
                 var result = await connection.Transport.Input.ReadAsync();

src/SignalR/clients/ts/FunctionalTests/ts/ConnectionTests.ts

@@ -185,6 +185,8 @@ describe("connection", () => {
 
                         await connection.start(TransferFormat.Text);
 
+                        await connection.stop();
+
                         await closePromise;
                     });
                 }