TracerProvider(ABC) doc string correction

[42Questions]

Description

Correction to class TracerProvider(ABC) docstring, extensively discussed but never implemented open-telemetry/opentelemetry.io#2517 .

Correction to class TracerProvider(ABC).get_meter docstring as well with the same mistake.

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[xrmx]

Isn't every instrumentation using __name__ though?

[42Questions]

Isn't every instrumentation using __name__ though?

Yes. I've purposefully done a minimal change, but as mentioned here, a less prescriptive docstring could be warranted:

instrumenting_module_name: The uniquely identifiable name for instrumentation scope, such as instrumentation library, package, module, or class name.

That said, the current docstring is incorrect:
__name__ may not be used as this can result in [...]
and did cause me confusion as a newcomer to OTEL.

@xrmx Would it make sense to still include a warning about using __name__ ?

[42Questions]

@xrmx Can the changelog be skipped for this?
I've also corrected the MeterProvider.get_meter docstring.

[xrmx]

@42Questions I've opened open-telemetry/opentelemetry-python-contrib#4173 to pass an explicit value instead of __name__ so the new description should be fine I think