Complete scripts to bootstrap alma9

A more complete alma9 set of tags and repos can be set up now with the addition of these extra scripts:

In addition some of the existing scripts have been adapted so an env ARCH=x86_64 can be specified as an override. Useful for AIO building.

Creating a alma set of tags is now a case of running the following:

• env ARCHES=x86_64 PROFILE=aio ./external9al.sh # new
• env ARCHES=x86_64 PROFILE=aio ./defaults9al # new
• env ARCHES=x86_64 PROFILE=aio ./buildsys9al.sh # arch only
• env ARCHES=x86_64 PROFILE=aio ./external_epel9.sh # new
• env ARCHES=x86_64 PROFILE=aio ./epel9.sh # arch only
• env ARCHES=x86_64 PROFILE=aio ./cern9al.sh # arch only
• env ARCHES=x86_64 PROFILE=aio ./external_cern9al.sh # new
• env ARCHES=x86_64 PROFILE=aio ./external_alma9_cern.sh # new
• env ARCHES=x86_64 PROFILE=aio ./alma9_cern.sh # new
• env ARCHES=x86_64 PROFILE=aio ./mytag9al.sh # arch only

This does not include the image tags or afs tags.