Add out of box support for Rocky Linux

[bluikko]

Closes #204.

Add Rocky Linux 8 and 9 OS string and OVAL URLs.

Currently untested.

I notice that in DefaultConfig.php https://github.com/CESNET/pakiti-server/blob/master/src/common/DefaultConfig.php#L147 there is a regex for RHEL that includes all variants, including AlmaLinux that already has the 2 changes included in this PR.
Wondering if that is normal or should AlmaLinux and Rocky Linux be removed from lines 147-148 if they are handled individually later in the same file?

[HavrilaJ]

Hi, no that Alma shouldn't be with RHEL becasue it has its own OVAL right now. I will fix it in DefaultConfig.

I didn't know that Rocky published its own OVALs. I just swiflty tried it, but pakiti has some errors reading it, but as soon as I will find out where is the problem it will be added here.

[bluikko]

Hi, no that Alma shouldn't be with RHEL becasue it has its own OVAL right now. I will fix it in DefaultConfig.

The same 2 lines also include Rocky Linux that this PR seeks to address.

I didn't know that Rocky published its own OVALs. I just swiflty tried it, but pakiti has some errors reading it, but as soon as I will find out where is the problem it will be added here.

Thanks!