Fix GitLab project import when a user has access only to their default namespace
What does this MR do?
It fixes a bug when a namespace ID was not passed to
/import/gitlab_project/new page. It occurred when a user have no choice of the namespace, so we did not render the input for namespace ID. This MR introduces a hidden input for the described case.
Does this MR meet the acceptance criteria?
- Added for this feature/bug
- All builds are passing
- Conform by the merge request performance guides
- Conform by the style guides
Branch has no merge conflicts with
master(if it does - rebase it please)
- Squashed related commits together
What are the relevant issue numbers?
Fixes #23507 (closed)