doc/monitoring: add min vers of apps in mon stack

doc/monitoring: add min vers of apps in mon stack

https://tracker.ceph.com/issues/45447

This PR adds recommended versions of grafana and
prometheus and alert manager.

This PR is a second attempt at getting the information
in the following PR into the docs:
https://github.com/ceph/ceph/pull/46000/files

Himadri Maheshwari deserves the credit for the work
in this commit.

Signed-off-by: Zac Dover <zac.dover@gmail.com>
Signed-off-by: Himadri Maheshwari <himadri.maheshwari7915@gmail.com>
(cherry picked from commit 367695f5b09f75ee723d53116e2f4a6e45dd795d)