New option: Support `"fetch"` in `"ignore"` option of `n/no-unsupported-features/node-builtins` about eslint-plugin-n

[aladdin-add]

it should have been supported, we just need to update the docs.

[scagood]

I can confirm, this is supported:
https://eslint-online-playground.netlify.app/#eNqNkbtuwzAMRX9F4JIWiOU9WTr0L6IMqkW7SmVK0KNIEfjfq4cdZMiQxRbEc8V7yRsEP/R4lbMzyC8BDjBiHL7fdjKo3fsR9oDBaIp8sDTqqSF6dtZHdgls9HZmAj4a1F+CgKOgtU5buVU7Z9KkqaPK4LUyCkeZTGQnQSw/uLYJ3ONg5xlJodqX0q18GOOc08acBIxGxv4BFXCuNGM+GQyHTfaKkFfJKmfZNfVku0QhueIUVTeijMljyPcKu6+kTdSUEx+a+02H3lsv4P5SNs/0RDYrC9kGnBuy5Y6c22Epv3J7zgPKo3dy+JFT2YulPPYaRkD8c1iaCpityp7XVgIU/n6iK3lo0FiNrfm3FTRZzo4hn9f2T/bzlHpc8iNQTQtaYPkHNczArg==

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The only difference is that n/no-unsupported-features/es-builtins is the wrong rule, it should be n/no-unsupported-features/node-builtins.

We added the globals to node-builtins in #261 and removed the incorrect globals in #258.

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We also do have this documented:

ES Builtins

Node Builtins

The one thing I think we need to do is to is to make the documentation in n/no-unsupported-features/node-builtins less explicit 🤔

[regseb]

I got confused between the n/no-unsupported-features/node-builtins and n/no-unsupported-features/es-builtins rules. The rule n/no-unsupported-features/node-builtins supports "fetch". There's just the documentation to update.