- replaces several instances of deprecated Cloud API usage with new
  Public API (because the old endpoints don't return Azure
  resources)
- successfully installs BYOC Azure agent
- allow override headers on POST requests for rpcloud_client
- workaround for /snap/bin not showing up in $PATH (making `az` CLI
  not show up as an available command)
- Azure support for config_profile_verify test
- Provider-specific workarounds for cases where the Azure operator has
  chosen to name things differently than the AWS and GCP operators