Move Ci::Variables::Collection#expand_value to protected
What does this MR do and why?
This MR moves Ci::Variables::Collection#expand_value
to protected from public.
This method is only used in the class and it is confusing when it is public. This commit also removes its tests and moves some of them to the sort_and_expand_all tests.
Related to #370273 (closed)
MR acceptance checklist
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I have evaluated the MR acceptance checklist for this MR.
Edited by Furkan Ayhan