Define sharding key for `snippets`
Problem
See epic description: &13636
Context
At this point, the snippets
migration should be completed.
Task
Set sharding_key
to https://gitlab.com/gitlab-org/gitlab/blob/db7dd37347a156203b8368ae2e6a72e594687e43/db/docs/snippets.yml#L12.
sharding_key:
project_id: projects
group_id: namespaces
Edited by Vasilii Iakliushin