refactor: drop old gopsutil dependency

[kruskall]

What does this PR do?

We're using two different versions of the gopsutil library. Drop the old version and only use the modern module-aware dependency

Why is it important?

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.md

Author's Checklist

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