[el9] Make sure to install openldap-compat which is needed by gfal2

[smuzaffar]

Looks like gfal2 needs openldap-compat but is missing it dependency. So this PR makes sure that we have install it explicitly for grid containers

[cmsbuild]

A new Pull Request was created by @smuzaffar for branch master.

@iarspider, @aandvalenzuela, @smuzaffar, @cmsbuild can you please review it and eventually sign? Thanks.
@antoniovilela, @rappoccio, @sextonkennedy you are the release manager for this.
cms-bot commands are listed here

[cmsbuild]

cms-bot internal usage

[smuzaffar]

openldap-compat is already installed via almalinux:9 base image , so no need to build our el9 container. We can merge this once we have to rebuild our container for any other change e.g when base image is changed or when there is any other update needed

[aandvalenzuela]

It is time to build a new el9 image, since the base image changed (See #285). Let's get this PR in!