Support Azure database auto-discovery using the discovery_service

[philip-teleport]

What would you like Teleport to do?

Support Azure database auto-discovery using the discovery_service.

What problem does this solve?

On v17, Azure database auto-discovery uses the database_service for both discovery and database connection. As a result, the discovery and database connection functions cannot be managed and scaled separately and cannot be dynamically configured using the discovery_config resource.

If a workaround exists, please include it.

Use the database_service.