Refactor revocation recovery to be generic

[dbluhm]

Reference: https://github.com/hyperledger/aries-cloudagent-python/blob/anoncreds-rs/aries_cloudagent/revocation/recover.py

These recovery helpers enable catching a ledger up to the state stored in the wallet. This out-of-sync issue can occur under a number of circumstances and has been corrected in the past using these recovery steps through the PUT /revocation/registry/{rev_reg_id}/fix-revocation-entry-state endpoint.

Currently, these recovery helpers are implemented in an Indy Specific manner, using the Indy VDR library directly. This should be made more generic by using the new AnonCreds interface to accomplish the same goals.

[dbluhm]

See also: https://github.com/hyperledger/aries-cloudagent-python/blob/anoncreds-rs/aries_cloudagent/anoncreds/default/legacy_indy/registry.py#L664-L739