V9: Allowlisting remote URLs for displaying content on the content dashboard (#11825)

* Fixing ContentDashboardSettings to work when set in the config

* Moving file in Models folder and adding ContentDashboardUrlAllowlist setting

* Implementing allowlist for content dashboard base url

* Cleanup

* Error msg vs log msg

src/Umbraco.Core/DependencyInjection/UmbracoBuilder.Configuration.cs

@@ -82,7 +82,8 @@ namespace Umbraco.Cms.Core.DependencyInjection
                 .AddUmbracoOptions<BasicAuthSettings>()
                 .AddUmbracoOptions<RuntimeMinificationSettings>()
                 .AddUmbracoOptions<LegacyPasswordMigrationSettings>()
-                .AddUmbracoOptions<PackageMigrationSettings>();
+                .AddUmbracoOptions<PackageMigrationSettings>()
+                .AddUmbracoOptions<ContentDashboardSettings>();
 
             return builder;
         }