dynamic imports for groups: pages

What does this MR do?

dynamic imports for groups: pages

EE MR https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/3989

Does this MR meet the acceptance criteria?

• Tests added for this feature/bug
• Review
  • Has been reviewed by Frontend
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ce/issues/41341