Execute zoekt task even repo not found

What does this MR do and why?

For the delete task mostly the repo is already deleted, so we can use the safe navigation to delete the repo. Here is the discussion: https://gitlab.slack.com/archives/C3TMLK465/p1717668289690579?thread_ts=1717664847.488029&cid=C3TMLK465

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

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