Documentation: Missing catatonit install step for EL

https://github.com/containers/podman.io/blame/7f0d60aac3023a545d707426e78901573c98208d/docs/installation.md#L379-L389

`catatonit` is mentioned as a runtime dependency in the build from source part only in the context of installing it on Fedora.

To install `catatonit` on EL9 derivatives a user must run:

`dnf install catatonit --enablerepo=crb`

I am guessing there is a similar requirement for EL8/EL7 derivatives.

This does not install catatonit:

`sudo dnf -y builddep rpm/podman.spec --enablerepo=crb`

Start in docs/installation.md at lines 379-389 and compare the existing Fedora catatonit instructions with the EL build-from-source instructions. Document the required dnf install catatonit --enablerepo=crb step for EL9 derivatives, and verify whether equivalent steps are needed for EL8 or EL7; done means the installation guide covers the required catatonit dependency.

Written by the indexing model from the issue text.