Improvements

Rook v1.7.1 s a patch release limited in scope and focusing on small feature additions and bug fixes.

Ceph

• Update Ceph CSI version to v3.4.0 (#8425, @Madhu-1)
• Add ability to specify the CA bundle for RGW (#8492, @degorenko)
• Remove unused mon timeout cli flags (#8489, @leseb)
• Add an option to enable/disable merge all placement (#8381, @subhamkrai)
• Refuse to failover the arbiter mon on stretch clusters (#8520, @travisn)
• Improve topology example of cluster on local pvc (#8491, @satoru-takeuchi)