[PM-26377] Add Auto Confirm Policy (#6552)

* First pass at adding Automatic User Confirmation Policy.
* Adding edge case tests. Adding side effect of updating organization feature. Removing account recovery restriction from validation.
* Added implementation for the vnext save
* Added documentation to different event types with remarks. Updated IPolicyValidator xml docs.

src/Core/AdminConsole/OrganizationFeatures/Policies/PolicyServiceCollectionExtensions.cs

@@ -53,6 +53,7 @@ public static class PolicyServiceCollectionExtensions
         services.AddScoped<IPolicyUpdateEvent, FreeFamiliesForEnterprisePolicyValidator>();
         services.AddScoped<IPolicyUpdateEvent, OrganizationDataOwnershipPolicyValidator>();
         services.AddScoped<IPolicyUpdateEvent, UriMatchDefaultPolicyValidator>();
+        services.AddScoped<IPolicyUpdateEvent, AutomaticUserConfirmationPolicyEventHandler>();
     }
 
     private static void AddPolicyRequirements(this IServiceCollection services)