AO3-7312 Remove CollectionSweeper and move cache expiry to models

[0111-0222]

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Issue

https://otwarchive.atlassian.net/browse/AO3-7312

Purpose

The CollectionSweeper class was legacy rails cache sweeper that expired collection blurb and profile fragment caches. I removed the sweeper and moved the cache expiry logic into after_commit callbacks on the Collection, CollectionProfile, CollectionParticipant, and CollectionItem models

Testing Instructions

See Jira

Credit

0111-0222 (he/him)