LMR QA | Improvement | Using the API for importing
## What is currently available The current import for an exported project from GitLab is using the browser UI and with that, it tends to be slower but more importantly, less stable. Adding a file to the API is not working out of the box. ## What is proposed Researching and adding the ability to add a file to the `fabricate_via_api` function and thus be able to upload files with it. When this is working, we need to add a `fabricate_via_api` method to the import_project resource and thus start using it instead of the `browser_ui`. ## What does this entail Looking deeper into the API fabrication and figuring out how to attach files to it. Afterwards, we need to implement the `fabriacte_via_api` function that is currently throwing the `NotImplemented` exception. ## Relevant links * The main KR Issue: https://gitlab.com/gitlab-com/www-gitlab-com/-/issues/11448 * Preparing importing MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/63527
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