structopt: Migrate to clap

[tgonzalezorlandoarm]

According to https://github.com/TeXitoi/structopt/issues/525,
structopt has entered maintenance mode, and clap should be used
for new development.

 * Migrate to clap so that nightly builds succeed as well.

[tgonzalezorlandoarm]

Please note this changes the exception list for dependency mismatch for parsec to include heck, which seems unavoidable

[tgonzalezorlandoarm]

This is supposed to solve the issues in https://github.com/parallaxsecond/parsec/actions/runs/8319327971/job/22762462593

[tgonzalezorlandoarm]

I triggered a nightly run in here: https://github.com/tgonzalezorlandoarm/parsec/actions/runs/8328515939

[tgonzalezorlandoarm]

The failure in the CI mismatch check is in teh parsec-tool and is expected, as the same change is coming with this pr: https://github.com/parallaxsecond/parsec-tool/pull/125

[tgonzalezorlandoarm]

Please refer to https://github.com/TeXitoi/structopt/issues/525 for more information