OTLP exporter: encode instrumentation scope schema url and attributes to otlp proto

[dbarker]

Description

Fixes #4358

This PR updates the OTLP encoding methods to encode the Instrumentation Scope schema url and attributes to the proto messages for logs, metrics and traces.

Without this change the schema url and attributes set on the GetMeter, GetTracer, and GetLogger methods from providers are not exported in OTLP protobuf messages.

Unit tests have been updated to check these fields are populated with the fix.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

This PR adds new cases to the logs, metrics, and trace encoding tests in opentelemetry-exporter-otlp-proto-common to cover the instrumentation scope schema url and attributes.

Does This PR Require a Contrib Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[dbarker]

Ready for review. Thanks in advance for the feedback!

[xrmx]

@dbarker fyi no need to update this at every commit, we usually merge main before merging or during reviews 😅

[dbarker]

@dbarker fyi no need to update this at every commit, we usually merge main before merging or during reviews 😅

haha.. thanks for the heads up and review. Just making sure it is up to date and conflict free.. :)