Create a new API "update' in user controller

[shepilov]

This is the request params, and information we can update

export interface UserObject {
  email: string;
  picture: string;
  first_name: string;
  last_name: string;
  full_name: string;
}

if the email is set and it's different from the current one, we should update login information with ExternalUser(entity that we use in case of OIDC user provider)

in e2e test we should test that user is able to login after email change