Fixes big pipeline and small pipeline width problems

What does this MR do?

In the big pipeline graph, the container was not overflowing correctly In the small pipeline graph removes padding form the cell in order to make the last node accessible in pipelines with a lot of stages Fixes the tooltip text being outside the tooltip

Screenshots

Before:

After:

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated
• API support added
• Tests
  • 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?

Closes #26667 (closed)