Use a standalone struct name for Organization (#17632)

* Use a standalone struct name for Organization

* recover unnecessary change

* make the code readable

* Fix template failure

* Fix template failure

* Move HasMemberWithUserID to org

* Fix test

* Remove unnecessary user type check

* Fix test

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/convert/convert.go

@@ -277,10 +277,10 @@ func ToDeployKey(apiLink string, key *models.DeployKey) *api.DeployKey {
 }
 
 // ToOrganization convert models.User to api.Organization
-func ToOrganization(org *models.User) *api.Organization {
+func ToOrganization(org *models.Organization) *api.Organization {
 	return &api.Organization{
 		ID:                        org.ID,
-		AvatarURL:                 org.AvatarLink(),
+		AvatarURL:                 org.AsUser().AvatarLink(),
 		UserName:                  org.Name,
 		FullName:                  org.FullName,
 		Description:               org.Description,