Merge into collector_logging again to resolve conflicts (#371)

* Do not use IsZero on timestamps obtained from pdata (#336)

* do not use IsZero on timestamps obtained from pdata

* send summary counts as doubles instead of integers (#338)

* drop data points with no value set (#339)

* handle NaN sums in histograms and exponential histograms (#340)

* Fix broken links, typos in docs (#345)

* Update fixtures based on upstream changes to the prometheus receiver (#346)

* update fixtures based on upstream changes to the prometheus receiver

* feat(propagator): create a new one-way propagator (#343)

* feat(propagator): create a new one-way propagator

CloudTraceOneWayPropagator moves trace info from X-cloud-trace-context
into 'traceparent'.

* Apply suggestions from code review

Co-authored-by: David Ashpole <dashpole@google.com>

* Update propagator to extract both, emit only traceparent

Users will no longer need to create a composite propagator, and there's
a clear precedence order between trace headers.

Co-authored-by: David Ashpole <dashpole@google.com>

* Demonstrate that integration tests aren't catching failures (#349)

* demonstrate that integration tests aren't catching failures

* Update dependencies (#347)

update dependencies

* address remaining nits from #347 (#351)

* prepare for release (#353)

* add integration test with metrics from the prometheus receiver (#348)

* add make commands for release (#354)

* Send timeseries synchronously (#358)

* send timeseries syncronously

* update docs, and fix existing broken test

* Drop histograms without a sum (#359)

* update opentelemetry collector to v0.49.0

* drop histograms without a sum

* Add sum of squared deviation estimate (#341)

* add sum of squared deviation estimate

* Add missing otel attributes to Spans exported to Cloud Trace (#365)

* Add instrumentation library to span attributes.

* Add test to ensure resource + instrumentation-scope labels show up in spans.

* Expand testing.

* Move resource mapping into shared module, and add monitored resource labels to trace spans.

* Do the go mod tidy shuffle.

* Fix docker build to include new shared module.

* Bump back to go 1.17

* Migrate to SDK version of semantic convention constants instead of Collector's.

* Clean up documents.

* Normalize histograms, summaries, and exponential histograms (#360)

* normalize remaining cumulative data points

* use the timeout passed to the metrics exporter (#369)

Co-authored-by: David Ashpole <dashpole@google.com>
Co-authored-by: Marc Dougherty <muncus@users.noreply.github.com>
Co-authored-by: Josh Suereth <joshuasuereth@google.com>