[PM-16684] Integrate Pricing Service behind FF (#5276)

* Remove gRPC and convert PricingClient to HttpClient wrapper

* Add PlanType.GetProductTier extension

Many instances of StaticStore use are just to get the ProductTierType of a PlanType, but this can be derived from the PlanType itself without having to fetch the entire plan.

* Remove invocations of the StaticStore in non-Test code

* Deprecate StaticStore entry points

* Run dotnet format

* Matt's feedback

* Run dotnet format

* Rui's feedback

* Run dotnet format

* Replacements since approval

* Run dotnet format

src/Api/Controllers/PlansController.cs

@@ -1,5 +1,5 @@
 using Bit.Api.Models.Response;
-using Bit.Core.Utilities;
+using Bit.Core.Billing.Pricing;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 
@@ -7,13 +7,15 @@ namespace Bit.Api.Controllers;
 
 [Route("plans")]
 [Authorize("Web")]
-public class PlansController : Controller
+public class PlansController(
+    IPricingClient pricingClient) : Controller
 {
     [HttpGet("")]
     [AllowAnonymous]
-    public ListResponseModel<PlanResponseModel> Get()
+    public async Task<ListResponseModel<PlanResponseModel>> Get()
     {
-        var responses = StaticStore.Plans.Select(plan => new PlanResponseModel(plan));
+        var plans = await pricingClient.ListPlans();
+        var responses = plans.Select(plan => new PlanResponseModel(plan));
         return new ListResponseModel<PlanResponseModel>(responses);
     }
 }

src/Api/Controllers/SelfHosted/SelfHostedOrganizationLicensesController.cs

@@ -64,7 +64,8 @@ public class SelfHostedOrganizationLicensesController : Controller
 
         var result = await _organizationService.SignUpAsync(license, user, model.Key,
             model.CollectionName, model.Keys?.PublicKey, model.Keys?.EncryptedPrivateKey);
-        return new OrganizationResponseModel(result.Item1);
+
+        return new OrganizationResponseModel(result.Item1, null);
     }
 
     [HttpPost("{id}")]