RFC: use semodule --checksum and priorities instead of datastore

[bachradsusi]

I probably miss some piece of the puzzle but it looks like all datastore functionality could be implemented using semodule utility or libsemanage library. Bellow are shell snippets describing how it could work.

• List() semodule -lfull | grep -E '^350

• Put() is not necessagy, it's automatically covered by semodule -i ...

• Get()

# semodule -lfull --checksum | grep -E '^350 ' | grep $policy
350 testpolicy           cil           sha256:0d682da9f705d4a44bad5151c59598f96a1839e10efe5f00b2bd16ba3c562676 

This works on Fedora 36, RHEL-8.6, and RHEL9 and later

• Remove() - automatically covered by semodule -r ...

[bachradsusi]

https://github.com/containers/selinuxd/pull/81