Add callout for global_tags for outgoing Client SDK Telemetry

### Temporal Affiliation

- [x] I am a Temporal employee

### Content Suggestion

The [global_tags](https://python.temporal.io/temporalio.runtime.TelemetryConfig.html#global_tags) option allows team-specific & company-specific tags to be added to all outgoing Client SDK Telemetry doesn't seem to be covered in the docs.