symlinked lib and lib64 in venv gives warning of multiple versions of same plugin

[asnyv]

Describe the bug
Warnings written of multiple occurences of same plugin if lib and lib64 are symlinked (appears like the package is installed twice for importlib_metadata).

How to reproduce
Steps to reproduce the behavior:

1. Create a virtual environment (using python -m venv yourvenv, the behavior seems different for virtualenv. Not sure why)
2. pip install webviz-config
3. webviz build examples/basic_example.yaml
4. See warnings in terminal

Expected behavior
Not write warning

Additional context
Suggest to ignore if the metadata is completely equal for the two occurences of the same entry point.