Merge branch '463854-import-sharding-bulk_import_export_uploads' into 'master'

Update bulk_import_export_uploads sharding

See merge request !168388



Merged-by: Andy Schoenen <asoiron@gitlab.com>
Approved-by: Bojan Marjanovic <bmarjanovic@gitlab.com>
Approved-by: Andy Schoenen <asoiron@gitlab.com>
Co-authored-by: Keeyan Nejad <knejad@gitlab.com>

db/docs/bulk_import_export_uploads.yml

@@ -8,5 +8,21 @@ description: Used to store information of the exported files containing the data
   groups or projects
 introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/59976
 milestone: '13.12'
-gitlab_schema: gitlab_main
-sharding_key_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/463854
+gitlab_schema: gitlab_main_cell
+desired_sharding_key:
+  project_id:
+    references: projects
+    backfill_via:
+      parent:
+        foreign_key: export_id
+        table: bulk_import_exports
+        sharding_key: project_id
+        belongs_to: export
+  group_id:
+    references: namespaces
+    backfill_via:
+      parent:
+        foreign_key: export_id
+        table: bulk_import_exports
+        sharding_key: group_id
+        belongs_to: export