Include OpenTelemetry Environment resource

[anuraaga]

Summary

Add Environment resource when initializing OpenTelemetry

https://github.com/argoproj/argo-workflows/blob/main/util/telemetry/metrics.go#L50
https://github.com/open-telemetry/opentelemetry-go/blob/e8cd4aac1bb9ffa08672aa9e9c9227b2dd6c46b6/sdk/resource/resource.go#L247

Use Cases

Users may have some expectations on resource attributes in their OpenTelemetry configuration, for example I would like to set the instance ID to the k8s pod name. The env resource gives flexibility to deployments of argo workflows

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