Feature Request: get azure locations and availability zones on demand

[jaredfholgate]

Description

At the moment we curate a list of regions for validation and a list of regions with availability zones for availability zone support.

Rather than curating a list, we should query the relevant Azure API and pull them on demand.

This will avoid manual errors and always keep the list up to date with reality.

Describe the solution you'd like

Send out an API request from the accelerator for a list of supported regions and availability zones.

Describe any alternatives you've considered

Continue to manually curate the list.

Additional context

[jaredfholgate]

This was released as part of the refactoring for SLZ