Add Aspire orchestration

Therefore remove previous OpenTelemetry configuration and use the one
provided in service defaults

src/Vegasco.Server.AppHost/Program.cs

@@ -0,0 +1,14 @@
+using Vegasco.Server.AppHost.Shared;
+
+var builder = DistributedApplication.CreateBuilder(args);
+
+var postgres = builder.AddPostgres(Constants.Database.ServiceName)
+	.WithDataVolume()
+	.AddDatabase(Constants.Database.Name);
+
+builder
+	.AddProject<Projects.WebApi>(Constants.Projects.WebApiName)
+	.WithReference(postgres)
+	.WaitFor(postgres);
+
+builder.Build().Run();