Recover from missing comps.xml for installed groups

[m-blaha]

We store basic information about installed comps groups in system state (groups.toml) but to make dnf5 group list/info/upgrade comands work we also need to know all the details about repo as it is in repository comps.xml.
In case these xml files are missing, installed repos are not loaded to the sack and it looks as they were not installed.
These xml files are created by dnf5 after group installation, but n case the system state was converted from dnf4 history db, they are missing.
To re-create them use

1. information about group from available repositories
2. if it fails, fall-back to creating minimal solvables directly from system state information (groupid and list of installed packages)