Merge PR #38108 into master

* refs/pull/38108/head:
	doc, man: man page for `cephfs-top` utility
	doc: document `cephfs-top` utility
	test: selftest for `cephfs-top` utility
	spec, deb: package cephfs-top utility
	cephfs-top: top(1) like utility for Ceph Filesystem
	mgr/stats: include kernel version (for kclients) in `perf stats` command output
	mgr/stats: include version with `perf stats` output

Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>