use unique module names in unit and integration tests #4501
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Refs #4265 (comment) and #4265 (comment).
Adds a dev dependency on
uuid
and uses it to define a helper to generate unique module names based on a base string. I then use the helper in usages ofPyModule::from_code
in unit and integration tests. Doctests don't need it because rustdoc spawns one process per code block.