replay: Replace collision aware policy with retry proxy storage configuration
As it's now integrated within the retry proxy storage.
Related to swh-storage!924 (closed)
Note:
- tests will fail because swh-storage!924 (closed) needs to be merged and storage bumped first.
- This conflicts with swh-storage!927 (closed) (which moves the replayer in the storage). So this should be diffed against the storage when swh-storage!927 (closed) lands.
Test Plan
tox (will be happy at some point in time)
Migrated from D3015 (view on Phabricator)