Feedback: allow customer defined default image
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=535530) </details> <!--IssueSummary end--> As a customer I would like to declare the default image. Provide an option to change this input to `Use {Company} default devfile.` Where I can set a mapping to a base image of my choice. ![Screenshot 2025-04-10 at 5.53.58 PM.png](/uploads/83ebfceb3669a3e37f3fedc328cf88c1/Screenshot_2025-04-10_at_5.53.58_PM.png)
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