Add Amazon 2

[joshcooper]

Amazon 7 is an implementation detail, the actual OS is Amazon 2:
https://aws.amazon.com/amazon-linux-2 This adds a new target amazon2-AARCH64,
whose ABS template remains the same (amazon-7-aarch64), but platform is
different:

❯ bundle exec beaker-hostgenerator amazon2-AARCH64a --hypervisor abs
---
HOSTS:
  amazon2-AARCH64-1:
    platform: amazon-2-aarch64
    template: amazon-7-arm64
    hypervisor: abs
    roles:
    - agent
CONFIG: {}

❯ bundle exec beaker-hostgenerator amazon7-AARCH64a --hypervisor abs
---
HOSTS:
  amazon7-AARCH64-1:
    platform: amazon-7-aarch64
    hypervisor: abs
    template: amazon-7-arm64
    roles:
    - agent
CONFIG: {}

The template is what we request from ABS. The platform is what beaker uses
when constructing Beaker::Platform.new and allows tests to introspect the
platform they're running on, such as if host.platform =~ /amazon-/

❯ env | grep BEAKER                                                                                     
BEAKER_VERSION=https://github.com/voxpupuli/beaker#amazon2
BEAKER_PUPPET_VERSION=~> 4.0
BEAKER_HOSTGENERATOR_VERSION=https://github.com/voxpupuli/beaker-hostgenerator#amazon2
❯ cd ~/work/facter/acceptance
❯ bundle update
❯ env SHA=c6c5de5b1457d0cad36bcbb0ee94ec3c3486014d HOSTS=amazon2-AARCH64a bundle exec rake ci:test:setup

  17:32:52$ yum -y  install puppet-agent

...SNIP...

     Dependencies Resolved
    
    ================================================================================
     Package
         Arch    Version
                     Repository                                                Size
    ================================================================================
    Installing:
     puppet-agent
         aarch64 8.6.0.96.gc6c5de5b1-1.amazon2
                     pl-puppet-agent-c6c5de5b1457d0cad36bcbb0ee94ec3c3486014d  26 M
    
    Transaction Summary
    ================================================================================
    Install  1 Package
    Total download size: 26 M
    Installed size: 122 M
    Downloading packages:
    Running transaction check
    Running transaction test
    Transaction test succeeded
    Running transaction
      Installing : puppet-agent-8.6.0.96.gc6c5de5b1-1.amazon2.aarch64           1/1     
      Verifying  : puppet-agent-8.6.0.96.gc6c5de5b1-1.amazon2.aarch64           1/1     
    
    Installed:
      puppet-agent.aarch64 0:8.6.0.96.gc6c5de5b1-1.amazon2                          
    Complete!