Use git binary provided by Gitaly
This fixes the problem where Gitaly fails to boot because it requires Git 2.33. Our image has Git 2.31.
It is also better to use the Gitaly provided binary because it is the recommended way and GDK does the same.
Omnibus does the same too: https://gitlab.com/gitlab-org/omnibus-gitlab/-/blob/master/files/gitlab-cookbooks/gitlab/attributes/default.rb#L394
Edited by Heinrich Lee Yu