Investigate `x509_forced_cert_loading` feature flag
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=506033) </details> <!--IssueSummary end--> ### Problem Feature flag `x509_forced_cert_loading` is disabled on GitLab.com. It's not clear if the original problem still exists and if the fix is safe to apply. ### Proposal Review the original problem and try to test the fix behind the feature flag. Possible outcomes: * Proceed with a feature flag rollout * Remove the feature flag and code behind it
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