fix(opentelemetry): update tests for otel sdk 1.40.0 compatibility

[giorgiovilardo]

Description

Referring to opentelemetry-python#5009, the issue is a bit nuanced: there is one change to make upstream - long story very short, there is an unsafe attribute access that is triggered by passing no boundaries to ExplicitBucketHistogramAggregation i.e. aggregation_last_value = {Counter: ExplicitBucketHistogramAggregation()} and then pass this as preferred_aggregation to the InMemoryMetricReader, in tests/unit/test_contrib/test_opentelemetry.py:33-35.

This will be fixed upstream but also made more robust on Litestar side with the proposed change:

aggregation_last_value = {Counter: ExplicitBucketHistogramAggregation(boundaries=[])}

By fixing this, we would expose a subsequent problem on test_open_telemetry_middleware_with_http_route, more specifically when navigating scope_metrics via index with scope_metrics = resource_metrics.scope_metrics[0]; this is due to 1.40.0 TracerProviders having a new TracerMetrics class that instruments them. This changes the ordering on the scope_metrics, making indexed access fail.

The other proposed change will just get the correct scope skipping the otel tagged one.

This will allow, once upstream is done, to unpin (or in general update) opentelemetry-sdk

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📚 Documentation preview 📚: https://litestar-org.github.io/litestar-docs-preview/4662

[giorgiovilardo]

@xrmx @provinzkraut

[xrmx]

I think you also need to remove the upper bound in pyproject.toml to see if it's working with 1.40.0.

[giorgiovilardo]

hey @xrmx, yep already done that but not doing the unpin in this pr - leaving it to the more established contributors

relevant diffs / pip show

make test-all output

so yeah technically this is already able to receive otel 1.40.0 I guess, but still better to also fix upstream the unsafe access

[provinzkraut]

Thanks for this @giorgiovilardo! I agree with @xrmx though, we should remove the version constraint in this same PR

[giorgiovilardo]

@provinzkraut done ;)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.33%. Comparing base (ab72cc5) to head (6f585a1).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

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##             main    #4662   +/-   ##
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  Coverage   67.33%   67.33%           
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  Files         292      292           
  Lines       14938    14938           
  Branches     1675     1675           
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  Hits        10058    10058           
  Misses       4743     4743           
  Partials      137      137           

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