fix(backend): resolved workspace membership invite failure

[akhilmhdh]

What does it do?

1. The membership invite to workspace was failing because

https://github.com/Infisical/infisical/blob/main/backend/src/controllers/v1/membershipController.ts#L187

The above line expects the middleware requireWorkspaceAuth to have workspace details. But due to not having populate query in it. Workspace id is only available causing the access to be undefined.

Why is it needed?

1. This will fix workspace membership invite