Some AD cleanup

[Jutho]

@lkdvos , maybe you want to add yourself as a contributor to this PR (I don't know how to do that), as this was your idea.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
ext/TensorOperationsChainRulesCoreExt.jl	0.00%	9 Missing ⚠️

Files with missing lines	Coverage Δ
ext/TensorOperationsChainRulesCoreExt.jl	0.00% <0.00%> (ø)

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[lkdvos]

For future reference: this can be achieved by adding this to the commit message:

Co-authored-by: NAME <EMAIL@MAIL.COM>"

[lkdvos]

Which I just screwed up because of a trailing " 😆

It's okay though, I appreciate the sentiment!