E2E: Move knapsack configuration to on_setup hook

What does this MR do and why?

Describe in detail what your merge request does and why.

Runs initial knapsack configuration in on_setup hook which get's executed in all of the usecases

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Part of: https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/1034