Removes unnecessary load of LinkedTabs, Pipelines and MiniPipelineGraph classes

What does this MR do?

Removes unnecessary load of LinkedTabs, Pipelines and MiniPipelineGraph classes

They are already being loaded where they are need as a module 🎉

before	after

Does this MR meet the acceptance criteria?

• 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?

#38869 (moved)