[PM-11404] Account Management: Prevent a verified user from purging their vault (#4853)

* Add check for managed user before purging account

* Rename IOrganizationRepository.GetByClaimedUserDomainAsync to GetByVerifiedUserEmailDomainAsync and refactor to return a list. Remove ManagedByOrganizationId from ProfileResponseMode. Add ManagesActiveUser to ProfileOrganizationResponseModel

* Rename the property ManagesActiveUser to UserIsManagedByOrganization

* Remove whole class #nullable enable and add it to specific places

* Remove unnecessary .ToList()

* Refactor IUserService methods GetOrganizationsManagingUserAsync and IsManagedByAnyOrganizationAsync to not return nullable objects. Update ProfileOrganizationResponseModel.UserIsManagedByOrganization to not be nullable

* Update error message when unable to purge vault for managed account

src/Infrastructure.Dapper/AdminConsole/Repositories/OrganizationRepository.cs

@@ -168,7 +168,7 @@ public class OrganizationRepository : Repository<Organization, Guid>, IOrganizat
             commandType: CommandType.StoredProcedure);
     }
 
-    public async Task<Organization> GetByClaimedUserDomainAsync(Guid userId)
+    public async Task<ICollection<Organization>> GetByVerifiedUserEmailDomainAsync(Guid userId)
     {
         using (var connection = new SqlConnection(ConnectionString))
         {
@@ -177,7 +177,7 @@ public class OrganizationRepository : Repository<Organization, Guid>, IOrganizat
                 new { UserId = userId },
                 commandType: CommandType.StoredProcedure);
 
-            return result.SingleOrDefault();
+            return result.ToList();
         }
     }
 }