Resolve "Improve Variables validation message"
What does this MR do?
Removes duplicate validation from Project/Group variables.
Does this MR meet the acceptance criteria?
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Changelog entry added, if necessary - Review
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Has been reviewed by Backend
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Conform by the merge request performance guides -
Conform by the style guides -
Squashed related commits together -
End-to-end tests pass ( package-qa
manual pipeline job)
What are the relevant issue numbers?
Closes #43275 (closed)
Edited by Matija Čupić