Fix RepositoryVersion.content query failing when >65K units

[gerrod3]

fixes: #6772

This is the orm magic breaks down to this sql:

SELECT *
FROM "core_content" 
WHERE "core_content"."pulp_id" IN (
    SELECT unnest(U0."content_ids") AS "cids" 
    FROM "core_repositoryversion" U0
    WHERE U0."pulp_id" = 01980713-3ed0-7f9a-b1f5-20e774f746ae
)

[jobselko]

What about making a constant from this number, e.g. POSTGRESQL_MAX_PARAMS?

[bmbouter]

From reading this I think it's a hard-limit

[dkliban]

i tested this patch on our production instance. i was able to publish a repository with 267K units. It took a little less than 5 minutes!

[patchback]

Backport to 3.83: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.83/b6aaa2398d779caeba439938dcddcf43a5490569/pr-6784

Backported as #6786

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