opentelemetry callback plugin: remove code for Python <3.7

[russoz]

Summary

Looking into the code, it seems to go through hops to ensure it has a time function with nanoseconds:

https://github.com/ansible-collections/community.general/blob/main/plugins/callback/opentelemetry.py#L167-L189

However, the bare minimum Python version for the controller (where the callback runs) is 3.8, which could simplify the code immensely.

Issue Type

Feature Idea

Component Name

plugins/callback/opentelemetry.py

Additional Information

Code of Conduct

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[ansibullbot]

Files identified in the description:

• plugins/callback/opentelemetry.py

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