[PM-18870] Convert Organization to Business Unit (#14131)

* Add setupBusinessUnit to OrganizationBillingApiService

* Add setup-business-unit.component

* Updated designs and cleanup work

* Update existing logos for Provider Portal and Admin Console

* Fix broken test

libs/common/src/admin-console/enums/provider-type.enum.ts

@@ -1,5 +1,5 @@
 export enum ProviderType {
   Msp = 0,
   Reseller = 1,
-  MultiOrganizationEnterprise = 2,
+  BusinessUnit = 2,
 }