Template: Update dotnet project template to remove previous LTS checks (#20573)

* Remove now unnecessary LTS checks from project dotnet template

* Update the starter kit versions

src/Umbraco.Web.UI/Program.cs

@@ -25,9 +25,6 @@ app.UseUmbraco()
     })
     .WithEndpoints(u =>
     {
-        /*#if (UmbracoRelease = 'LTS')
-        u.UseInstallerEndpoints();
-        #endif */
         u.UseBackOfficeEndpoints();
         u.UseWebsiteEndpoints();
     });