Reschedule pack file too big failing loading task to dedicated queue consumed by large enough workers

Current git loading tasks can fail to be ingested with a [1] 'pack file too big' message. They are then disabled by the scheduler after a number of tryouts (3). Those could be redirected to another queue [2] whose consumption can happen only with large enough workers [3]. (with proper setup like pack file limit set to 32g or something).

• [1]

                raise IOError(
                    f"Pack file too big for repository {origin_url}, "
                    f"limit is {size_limit} bytes, current size is {cur_size}, "
                    f"would write {would_write}"
                )

• [3] worker17-18 currently

• [2] large-repository:swh.loader.git.tasks.UpdateGitRepository

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Migrated from T4390 (view on Phabricator)