* Use consistent case for "Deprecated" comments
Not the most important thing ever, but the canonical string to use for
Deprecated warnings is case sensitive, and also it's nice to be
consistent.
* Add nolint comment
* Expand the tracing package to support stackdriver.
This makes an assortment of changes to support the use of non-Zipkin tracing backends for publishing traces from system components based on config-tracing.
The changes to the config are modeled after config-observability, which already has support for prometheus and stackdriver backends for metrics.
* Incorporate review feedback.
* Incorporate feedback from @mdemirhan downstream
Dave Protasowski
Julian Friedman
Markus Thömmes
Matt Moore