* feat: Remove support for BrowserID
* mark test only functions as such. I think we can drop MapAndThenTrait for more recent implementations of rust.
Closes: SYNC-3684
* feat: Add metrics, gcp logging to tokenserver scripts
This adds GCP logging JSON output formatting for logs as well as DataDog
style metric reporting.
New Environs:
* `METRIC_API_KEY` - Optional Datadog API key
* `METRIC_APP_KEY` - Optional Datadog APP key
* `METRIC_HOST` - Collector Host address
* `METRIC_PORT` - Collector Host port
This also adds the `--human` arg if you want to use the older, human
readable logs instead.
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Co-authored-by: Philip Jenvey <pjenvey@underboss.org>