fix group issue in send_invite

[stefan0xC]

As pointed out in #5320 we have a small bug in this call:

For example I noticed that we are passing the wrong id here:

vaultwarden/src/api/core/organizations.rs

Line 910 in ed4ad67

let mut group_entry = GroupUser::new(String::from(group), user.uuid.clone());

Because in contrast to CollectionUser the GroupUser::new actually expects a different id:

vaultwarden/src/db/models/group.rs

Line 122 in ed4ad67

pub fn new(groups_uuid: String, users_organizations_uuid: String) -> Self {

This was probably overlooked because it's not a major issue when a user is not correctly invited to a group and it only shows up as a small warning in the logs:

[2024-12-22 21:23:47.022][request][INFO] POST /api/organizations/152bd996-19f9-40ee-b991-e52333a7e719/users/invite
[2024-12-22 21:23:47.031][vaultwarden::db::models::group][WARN] User could not be found!
[2024-12-22 21:23:48.082][response][INFO] (send_invite) POST /api/organizations/<org_id>/users/invite => 200 OK

Since reviewing my other PR will probably take a while this is a separate fix to address this one issue I found and remembered.