feat: use exponential histograms for the quickstart sample

[dashpole]

Same as GoogleCloudPlatform/opentelemetry-operations-python#364.

This also updates the collector version.

Since the environment variable isn't supported yet, I had to add this as an option to the OTLP exporter.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.72%. Comparing base (7f1ee19) to head (787cc4b).
Report is 56 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #782   +/-   ##
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  Coverage   97.72%   97.72%           
=======================================
  Files          18       18           
  Lines         703      704    +1     
  Branches      136      136           
=======================================
+ Hits          687      688    +1     
  Misses         16       16           

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