This is controlled with the feature flag gitlab_git_diff_size_limit_increase.
Both of these limits were basically picked arbitrarily in the first place;
disabling the feature flag reverts to the old limits.
Previously if the project had more than 100 branches or tags it wouldnt display them even after searching.
This now correctly sends an AJAx request to the backend to search for the branches/tags
Closes#29545
