Track making epics confidential/visible
What does this MR do?
It adds tracking for changing the visibility of epics.
It is based on !53651 (merged)
Does this MR meet the acceptance criteria?
Conformity
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📋 Does this MR need a changelog?-
I have included a changelog entry. -
I have not included a changelog entry because _____.
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Documentation (if required) -
Code review guidelines - [-] Merge request performance guidelines
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Style guides - [-] Database guides
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Separation of EE specific content
Availability and Testing
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Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
Related to #292253 (closed)
Edited by Jarka Košanová