Description of problem:
Trying to register an existing RHEL9 client system to my Satellite or Capsule and enabling REX pull mode there via registration template, the bash registration script fails on installing `foreman_ygg_worker` package.

The reason is `satellite-client-6-for-rhel-9-x86_64-rpms` has been disabled - probably from past. And registering the system within the bash script does not update this.

Before installing the package, we should enable the relevant repo.
 

How reproducible:
100% I guess

Steps to Reproduce:
1. have an existing RHEL9 client system, optionally with explicitly disabled `satellite-client-6-for-rhel-9-x86_64-rpms` repository.

2. generate a global registration bash script with REX pull mode enabled

3. run the curl ... | bash script on the RHEL9 client

Actual behavior:
3. fails with:

Starting deployment of REX pull provider
#
 # Installing packages
#
Updating Subscription Management repositories.
Red Hat Enterprise Linux 9 for x86_64 - BaseOS (RPMs) 148 kB/s | 4.1 kB 00:00 
Red Hat Enterprise Linux 9 for x86_64 - AppStream (RPMs) 169 kB/s | 4.5 kB 00:00 
No match for argument: foreman_ygg_worker
Error: Unable to find a match: foreman_ygg_worker
Host [pmoravec-rhel9.EXAMPLE.com] initial configuration failed

.. and `/etc/yum.repos.d/redhat.repo` has the `satellite-client-6-for-rhel-9-x86_64-rpms` repo disabled.

Expected behavior:
Register succeeds as therepo is enabled.