Description of problem:
Provide a supported tool to test ETCD performance, as bad performance of ETCD is a common cause of issues in OpenShift clusters.

Currently, there are KCS to test the ETCD disk performance using fio [1] [2], but the tool is not included in any supported image, and also not supported to use the fedora image.

Version-Release number of selected component (if applicable):
All OCP 4 versions, including 4.5

How reproducible:
See [1] and [2]

Actual results:
No supported tool to test ETCD performance

Expected results:
Documented and supported tools to test ETCD performance

[1] https://access.redhat.com/solutions/4885641
[2] https://access.redhat.com/solutions/4929021