When Database Shells Configuration Provider is used there is an exception on startup

[MikeAlhayek]

@jtkech When Database Shells Configuration Provider is used there is an exception on startup:

System.InvalidOperationException: StreamConfigurationProviders cannot be loaded more than once.
   at Microsoft.Extensions.Configuration.StreamConfigurationProvider.Load()
   at Microsoft.Extensions.Configuration.ConfigurationRoot.Reload()
   at OrchardCore.Environment.Shell.ShellSettingsManager.LoadSettingsAsync(String tenant)
   at OrchardCore.Environment.Shell.Distributed.DistributedShellHostedService.LoadingAsync()
   at OrchardCore.Environment.Shell.ShellHost.PreCreateAndRegisterShellsAsync()
   at OrchardCore.Environment.Shell.ShellHost.InitializeAsync()
   at OrchardCore.Modules.ModularTenantContainerMiddleware.Invoke(HttpContext httpContext)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

Originally posted by @wAsnk in #14117 (comment)

[jtkech]

Okay, we try to reload to prevent to rebuild some configs, I will fix it this night.

[jtkech]

Okay, fixed by #14499