Add Availability Zone for Azure

[cailyoung]

Component(s)

internal/metadataproviders, processor/resourcedetection

Is your feature request related to a problem? Please describe.

The existing Azure resource processor doesn't retrieve the AZ of the instance, which is a semantic convention attribute available for cloud resources.

Describe the solution you'd like

Extend the metadata client to grab zone from the IMDS response and make it available for the resourcedetection processor to add as the resource attribute cloud.availability_zone.

Describe alternatives you've considered

Theoretically I could plumb this in with an attribute processor and environment variables from the outside if we can predict which zone a given collector is running in, but automatic detection is a lot simpler.

Additional context

No response

[github-actions]

Pinging code owners:

• internal/metadataproviders: @Aneurysm9 @dashpole
• processor/resourcedetection: @Aneurysm9 @dashpole

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[VihasMakwana]

Looking at the code, this looks pretty simple. We just need to grab the zone from the response struct and add a new metadata entry.