Use id as first column for partitioned tables

What does this MR do and why?

Follow-up to !113247 (merged)

In gitlab-com/gl-infra/production#8547 (comment 1316698620) I've realized to the order of these column matter since we don't cascade the partition_id filters yet and for existing tables that we're partitioning we're adding the new PK this way:

ALTER TABLE ONLY ci_builds
    ADD CONSTRAINT ci_builds_pkey PRIMARY KEY (id, partition_id);

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