v5.2.0: v5.20 Patches to Upgrade Oracle, and Writeset generators (#1155)

* bump version number

* changelog

* format tower backlog error msg in edge case

* Docs for rescue writesets

* refactor epoch boundary counter reset in writeset builder

* Upgrade oracle to have upgrade function to expire a vote

* add vote revocation to Oracle Upgrade

* fullnode subsidy aka Carpe towers get paid anyways during the recovery mode

* recovery writeset should trigger the epoch counters to reset

* set the oracle expiry window

* add upgrade proposal expiration to rescue

* bind to correct module in Oracle

* patch writeset

* add upgrade expiration cli command

* make files

* refactor oracle upgrade expire writeset

* add txs helper for voting

* revoke functional test, passing

* deprecate fullnode payment in recovery mode test

* revoking vote, should revoke delegates

* test for revoking delegated votes

* patch test

* recovery mode uses the initial validators throughought the period

* makefile set recovery epoch 295

* including misko9's validator yaml configs

* update StateSyncConfig parameters