Re-enable OpenBao audit stream HTTP endpoint
## Summary Re-enable the HTTP audit streaming endpoint for OpenBao once the self-initialization timing issue is resolved. ## Context The HTTP audit stream was disabled as a temporary workaround for the self-initialization failure that occurs when the audit endpoint is unavailable during helm upgrade. Once #582828 is fixed, this functionality should be re-enabled to restore full audit logging capabilities. ## Implementation plan - [x] Revert https://gitlab.com/gitlab-org/charts/gitlab/-/merge_requests/4681+. - [x] Validate on GitLab CN or CNH.
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