chore: Fix imageUrl override to allow air-gapped turtles helm chart setup

[Danil-Grigorev]

What this PR does / why we need it:

Cherry-pick for #533

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Fixes #532

Special notes for your reviewer:

Checklist:

• [ ] squashed commits into logical changes
• [ ] includes documentation
• [ ] adds unit tests
• [ ] adds or updates e2e tests