storage: conditional puts do not respect the optional nature of value checksums #22636
Description
Upgrading a cluster across 75cbeb8 causes a never-ending stream of heartbeat failed on epoch increment errors, and the cluster is unable to serve requests.
Steps to reproduce:
git checkout 75cbeb84848c807437ce84dcb93229d17fbb4a7e~(note the ~)make- start a cluster
git checkout 75cbeb84848c807437ce84dcb93229d17fbb4a7emake- restart that cluster