shipit_bot_uplift: support multiple Taskcluster endpoints.
shipit_bot_uplift: support multiple Taskcluster endpoints.

mozilla-releng/services,La0/mozilla-relengapi,andrei987/services,La0/mozilla-relengapi,garbas/mozilla-releng-services,La0/mozilla-relengapi,lundjordan/services,mozilla-releng/services,garbas/mozilla-releng-services,srfraser/services,andrei987/services,andrei987/services,mozilla-releng/services,srfraser/services,garbas/mozilla-releng-services,lundjordan/services,lundjordan/services,garbas/mozilla-releng-services,La0/mozilla-relengapi,lundjordan/services,srfraser/services,andrei987/services,srfraser/services,mozilla-releng/services