Add agent system capabilities to azure_devops_agentpool_agent_info

[veronluc-ansys]

#115 introduced agent computer name by pulling agent system capabilities to the exporter.
I believe many people would need more than just the computer name - we could pull all the agent system capabilities.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[veronluc-ansys]

@mblaschke I see you reviewed #115. Can I ask you to take a quick look at this one? 🙏

[veronluc-ansys]

@cbat98 your input would also be valuable here :)

[mblaschke]

you're removing agentPoolAgentComputerName, is there a reason for that?

[veronluc-ansys]

you're removing agentPoolAgentComputerName, is there a reason for that?

agentPoolAgentComputerName is part of the SystemCapabilities that are ingested. We can keep on top though, if you want.

[mblaschke]

SystemCapabilities is a map[string]string, but labels must be a string.
i could add an option for a list of caps which should be added if they are available, but they should/must be set as own label or as own metric.

but keep in mind, this exporter is more or less in maintenance mode.
Azure DevOps was (more or less) dropped by Microsoft in favour of GitHub, even breaking Azure changes/api deprecations were not fixed in ADO pipeline tasks for months by Microsoft.

The contributions on the ADO pipeline tasks are currently nearly 0: https://github.com/microsoft/azure-pipelines-tasks/graphs/contributors but GitHub actions are heavly developed.
I recommend switching to a different product.