Add support for Microsoft Azure Linux to Facter 4.x

[mminkus]

Add support for Microsoft Azure Linux, previously known as CBL-Mariner, Microsoft's Linux distribution for cloud infrastructure and edge products and services.

Before:

# facter os
{
  architecture => "x86_64",
  family => "Linux",
  hardware => "x86_64",
  name => "Linux",
  release => {
    full => "6.6.22.1-2.azl3",
    major => "6",
    minor => "6"
  },
  selinux => {
    enabled => false
  }
}

After:

# facter os
{
  architecture => "x86_64",
  family => "Redhat",
  hardware => "x86_64",
  name => "AzureLinux",
  release => {
    full => "3.0.20240401",
    major => "3",
    minor => "0"
  },
  selinux => {
    enabled => false
  }
}

Fixes #2727

[puppetlabs-jenkins]

Can one of the admins verify this patch?

[AZaugg]

Can you add support for minor?

[joshcooper]

I think this is still an open question?

[mminkus]

We're actually getting minor in the facter output already, but I'm not sure how that's working.

[mhashizume]

Nit, but shouldn't both Mariner and AzureLinux be nested under Rhel (line 20)?

[mhashizume]

This looks good to me other than the hierarchy in lib/facter/config.rb and the minor conflict in lib/facter/framework/core/file_loader.rb. Today is feature complete for our next release of Puppet (during which we will also be including a new release of Facter), so I've created a new PR with your work and those minor changes: #2738