Revert "feat: add shell command superceding run"

Halil Cobanrequested to merge
temporarily-disable-shell-tool into main

What does this merge request do and why?

This MR reverts the shell tool. See details at https://gitlab.slack.com/archives/C09A8RP155K/p1765378461457389

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

Merge request checklist

  • Tests added for new functionality. If not, please raise an issue to follow up.
  • Documentation added/updated, if needed.
  • If this change requires executor implementation: verified that issues/MRs exist for both Go executor and Node executor or confirmed that changes are backward-compatible and don't break existing executor functionality.

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