Merge branch 'morefice/set-sharding-key-ci-builds' into 'master'

Set sharding key for ci_builds

See merge request !165181



Merged-by: Gregory Havenga <11164960-ghavenga@users.noreply.gitlab.com>
Approved-by: Panos Kanellidis <pkanellidis@gitlab.com>
Approved-by: Gregory Havenga <11164960-ghavenga@users.noreply.gitlab.com>
Co-authored-by: Maxime Orefice <morefice@gitlab.com>

db/docs/ci_builds.yml

@@ -12,4 +12,5 @@ description: TODO
 introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/commit/046b28312704f3131e72dcd2dbdacc5264d4aa62
 milestone: '8.0'
 gitlab_schema: gitlab_ci
-sharding_key_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/458488
+sharding_key:
+  project_id: projects

spec/lib/gitlab/database/sharding_key_spec.rb

@@ -112,6 +112,8 @@
             "If this is a foreign key referencing the specified table #{referenced_table_name} " \
             "then you must remove it from allowed_to_be_missing_foreign_key"
         else
+          next if Gitlab::Database::PostgresPartition.partition_exists?(table_name)
+
           expect(has_foreign_key?(table_name, column_name, to_table_name: referenced_table_name)).to eq(true),
             "Missing a foreign key constraint for `#{table_name}.#{column_name}` " \
             "referencing #{referenced_table_name}. " \