Why PODs use fuse-overlay fs storage driver in RHOCP4?

Issue

• Worker nodes alert for SystemMemoryExceedsReservation.
• fuse-overlay fs is not supported as the default storage driver.
• The file /var/lib/containers/storage/overlay/.has-mount-program has a true value.
• The node's mounts show the usage of the fuse-overlayfs storage driver for all the containers:
  • fuse-overlayfs on /var/lib/containers/storage/overlay/b0a9c6e6c63b69d0fe3defrkl666t3n741e2470164fc67f0193f77/merged type fuse.fuse-overlayfs (rw,nodev,noatime,user_id=0,group_id=0,default_permissions,allow_other)