22.7.0

• switch to golang 1.18
• update dependencies
• make AZURE_DEVOPS_AGENTPOOL optional (collect all agentpools)
• add servicediscovery (caching of project list)
• update build system (dockerbased crosscompiling)
• add azure_devops_api_request histogram metric (request tracing)
• bugfixes (thanks to @pge-bw)
• add result label for buildStatus metric (thanks to @pge-bw)