Add in Region Support

[spjmurray]

Think big! We should be able to support federating clouds together, just as we federate identity, so make it so! Anything region specific needs to index a region at the API, and let the rest be abstracted including site specific endpoints, credentials and configurations. We can now start to consider other things than openstack if the need arises. More pertinently we can also start thinking about moving the provider to the site itself to prevent leaking credentials in the honeypot at the center! This also means, we could perhaps think about not actually exposing the cloud API at all, and doing everything via the secure proxy... ugh, I'm exciting myself!!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0d4e133) 37.97% compared to head (25289af) 38.17%.
Report is 1 commits behind head on main.

❗ Current head 25289af differs from pull request most recent head 45bd006. Consider uploading reports for the commit 45bd006 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #3      +/-   ##
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+ Coverage   37.97%   38.17%   +0.19%     
==========================================
  Files           4        4              
  Lines         316      317       +1     
==========================================
+ Hits          120      121       +1     
  Misses        189      189              
  Partials        7        7              

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[spjmurray]

Note to self: now we (almost) have mapping rules in identity, this can enable private/customer-specific regions....