Populate sample project for review apps

What does this MR do and why?

Related: #25297 (closed)

Utilize the sample data projects template available in the application to populate one sample project for review app users.

Advantages:

• Dogfood the existing template available and the project import functionality
  • https://gitlab.com/gitlab-org/sample-data-templates/sample-gitlab-project
• New resources needed for review apps can be added to the sample project to enrich the data delivered. Also the review apps will receive new data added to the sample project by other teams

Disadvantages

• Currently this does not populate pipelines, etc, that could be populated by a different strategy like using the seeds

Available Data

• Initially 1 project populated with repo, issues, MRs
• Easily increase number of populated projects in the script if feedback dictates

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• Project in this MR's review env: https://gitlab-review-mf-ep-exp-gcbau2.gitlab-review.app/root/sample-project0