fix(ui): stop the add-provider modal from shifting while it loads (#13179)

ui/lib/runtime-config.shared.ts

@@ -13,6 +13,7 @@ export interface RuntimePublicConfig {
   reoDevClientId: string | null; // reserved
   cloudEnabled: boolean;
   cloudBillingEnabled: boolean;
+  registryEnabled: boolean;
   selfRegistrationEnabled: boolean;
   stripePublishableKey: string | null; // reserved
   stripePublishableKeyV2: string | null; // reserved
@@ -34,6 +35,7 @@ export const EMPTY_RUNTIME_PUBLIC_CONFIG: RuntimePublicConfig = {
   reoDevClientId: null,
   cloudEnabled: false,
   cloudBillingEnabled: false,
+  registryEnabled: false,
   selfRegistrationEnabled: true,
   stripePublishableKey: null,
   stripePublishableKeyV2: null,
@@ -55,6 +57,7 @@ const pickConfig = (
   reoDevClientId: parsed.reoDevClientId ?? null,
   cloudEnabled: parsed.cloudEnabled ?? false,
   cloudBillingEnabled: parsed.cloudBillingEnabled ?? false,
+  registryEnabled: parsed.registryEnabled ?? false,
   selfRegistrationEnabled: parsed.selfRegistrationEnabled ?? true,
   stripePublishableKey: parsed.stripePublishableKey ?? null,
   stripePublishableKeyV2: parsed.stripePublishableKeyV2 ?? null,