Feature flags are not properly passed to gitaly-git2go
We have recently introduced the mechanism to pass feature flags to gitaly-git2go in 47c23de0. This mechanism isn't working though: https://gitlab.com/gitlab-org/gitlab/-/jobs/2655862591 demonstrates that Gitaly sees the feature flag as enabled, but gitaly-git2go sees the feature flag as disabled. This mustn't happen and is a bug that we need to fix to ensure that we have a consistent view of flags.