squelch most clippy warnings in generated code

[gvozdvmozgu]

close #808

[codspeed-hq]

CodSpeed Performance Report

Merging #809 will not alter performance

_{Comparing gvozdvmozgu:silence-clippy (318524f) with master (4ab2d27)}

Summary

✅ 12 untouched benchmarks

[netlify]

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[MichaReiser]

Thanks. I guess that works :) It's the brute force approach but I'm not aware of an alternative. I'll merge this unless anyone else has an idea on how to approach this in a different way.