Support passing tracer provider in aiohttp server instrumentation lib

[bisgaard-itis]

Description

Support passing a TracerProvider when using the aiohttp server instrumentation library. This gives users of the library the possibility to provide their own TracerProvider instead of relying on the global one. This is in particular useful for testing.

Fixes # (issue)

• resolves Allow passing a TracerProvider when instrumenting an aiohttp server #3801

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• I added the test test_non_global_tracer_provider which checks that a non-global TracerProvider can be provided when instrumenting the aiohttp server. I check that the non-global TracerProvider is used by the instrumentation library by setting a non-default sampling probability in that provider and checking that the corresponding number of traces are collected.

Does This PR Require a Core Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

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

[linux-foundation-easycla]

• ❌ - login: @bisgaard-itis / name: Mads Bisgaard . The commit (0bbf03d, 78009dc, 7b9431d, cc5cb3e, f57983c) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please submit a support request ticket.

[xrmx]

@bisgaard-itis You need to sign the CLA in order to contribute to OpenTelemetry, thanks.