Upgrate Gitaly to v1.64.0
What does this MR do?
Upgrade Gitaly to v1.64.0
Changelog at Gitaly: https://gitlab.com/gitlab-org/gitaly/blob/master/CHANGELOG.md#v1640
Upgrade Gitaly to v1.64.0
Changelog at Gitaly: https://gitlab.com/gitlab-org/gitaly/blob/master/CHANGELOG.md#v1640