Shard abuse_reports

What does this MR do and why?

Shard abuse_reports

Addresses #571831 (closed) && #398199

Changelog: other

References

Number of rows where organization_id IS NULL -> https://postgres.ai/console/gitlab/gitlab-production-main/sessions/44901/commands/138048

Total number of rows in table -> https://postgres.ai/console/gitlab/gitlab-production-main/sessions/44901/commands/138049

SQL

UPDATE "abuse_reports" SET updated_at = updated_at WHERE "abuse_reports"."id" >= 1000 AND "abuse_reports"."id" < 2000 AND "abuse_reports"."organization_id" IS NULL

Explain query: https://postgres.ai/console/gitlab/gitlab-production-main/sessions/44901/commands/138043

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