ci: remove artifact branches.list
This patch reverts partially !344 (merged) and removes branches.list artifact.
We've decided to fetch it on side of infra ci.
- Follow-up for !344 (merged)
- See also https://git.picodata.io/picodata/web-site/infra/-/issues/2#note_65545
- Target branch: main
- Changes should be cherry-picked to 24.1: no
Edited by Yaroslav Dynnikov