feat(mypy): proper decorator typing with ParamSpec

[BobTheBuidler]

What was wrong?

More modern versions of python support ParamSpec in the typing module. This PR implements proper decorator typing with ParamSpec in all python versions that support it, and falls back to the current behavior on python versions that don't.

Related to Issue # N/A
Closes # N/A

How was it fixed?

Conditional definitions based on whether or not typing module has ParamSpec defined

Todo:

• Clean up commit history
• Add or update documentation related to these changes
• Add entry to the release notes

I did not update docs or release notes as I don't think its necessary for this type of change. Let me know if you disagree and I can do so.

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[BobTheBuidler]

All tests will pass if you allow me to # type: ignore [misc] away these mypy errors, and typing will still work properly downstream.

[BobTheBuidler]

Alternatively, I'd like to suggest making typing_extensions a dependency so we can use ParamSpec appropriately on all python versions

On second thought, I think this comment applies to the entire eth-xxx stack and could greatly improve typing