Reset variable visibility on form reset

What does this MR do and why?

Reset variable visibility on form reset

Ensure visibility is correctly reset after form submission.

Changelog: fixed

References

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• slack thread (internal)

MR acceptance checklist

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Screenshots or screen recordings

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

Before	After
Screen_Recording_2025-01-14_at_22.48.42	Screen_Recording_2025-01-14_at_22.47.30

How to set up and validate locally

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

1. Visit Project -> Settings -> CI/CD and select Variables section
2. Click Add variable
3. In the drawer, select masked or hidden and masked as visibility
4. Create a variable and verify after the form reset, the visibility is set back to Visible