Update our OTel dependencies, and move config into GMP module #709
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We need to switch from prometheus.BuildPromCompliantName to prometheus.BuildCompliantName, which takes an argument for enabling unit suffixes. We would like to allow users to disable unit suffixes, as the (upstream) feature gate will not apply to unit suffixes anymore.
I decided to simplify our API surface in the GMP module to reduce the number of breaking changes we will need to make in the future. To do this, I moved configuration related to naming, resource, and extra metrics into a config struct in this module. This will not result in any breaking changes upstream, since it copies existing configuration from the GMP exporter for target and scope info.
This also simplifies up the ExtraMetrics function, since we don't need to have it return anything.