Fixes #36525 - kickstart's RHSM line only works on RHEL hosts

Fixes #35840 - Install chrony on RHEL 7

Refs #35796 - Reduce empty lines

In 699b7a3b4e9069237031b2dfbee8dba2bbaadf8c an additional empty line was
generated which broke the snapshots. This takes it a step further and
also removes various other lines in the generated output.

Fixes: 699b7a3b4e9069237031b2dfbee8dba2bbaadf8c

Refs #35530 - Alternative approach to save_to_file

save_to_macro generates a command using cat and a heredoc string.
However, if the content to be written contains a heredoc using the same
delimiter, save_to_macro's heredoc will be terminated by it, leading to...

Fixes #35530 - Make save_to_file macro safer (#9426)

• Fixes #35530 - Make save_to_file macro safer

save_to_file does

cat <<EOF >$file
$content
EOF

but if `$content` contains a heredoc terminated with `EOF`, it
terminates the heredoc that save_to_file creates....

Fixes #35137 - Permit setting puppet tag during install

Fixes #34969 - Set up REX pull on client setup (#9235)

- Import katello-pull-transport-migrate
- Setup rex pull on registration
- Setup rex pull during provisioning
- Pass config params to slots/fills in registration form

Fixes #34908 - Set hostname for Ubuntu Autoinstall

Refs #34558 - update snapshots

Fixes #34339 - sanitize fqdn in tests

Tests were almost not using the fqdn defined in settings.yaml.test
That is quite confusing at first sight and we should not override this value by fixtures, only if overriden in the same test file.