www/gitlab: major upgrade to 17.1.0

Remove vendored sidekiq gem as it breaks gitlab for FreeBSD.
The vendored gem is used to keep gitlab compatible to redis 6.
See also:
gitlab-org/gitlab#468435

Changes:	https://about.gitlab.com/releases/2024/06/20/gitlab-17-1-released/