Improvements

Rook v1.7.8 is a patch release limited in scope and focusing on small feature additions and bug fixes to the Ceph operator.

• docs: add OMAP quick fix warning to the upgrade guide (#9187, @BlaineEXE)
• mon: Set cluster name to mon cluster (#9203, @parth-gr)
• osd: Add privileged support for OpenShift to blkdevmapper securityContext (#9191, @Omar007)
• osd: Set reduced blkdevmapper capabilities (#9158, @Omar007)
• helm: Set correct ingress endpoint protocol for https and http (#9181, @travisn)
• rgw: Allow downgrade of rgw daemon (#9137, @travisn)
• helm: Enable cephfs volume expansion by default (#9128, @travisn)
• core: Fail if config dir creation fails (#9122, @leseb)
• osd: Increase wait timeout for osd prepare cleanup (#9116, @travisn)
• pool: Allow more data chunks in an EC pool (#9107, @travisn)