Add stubs for pyasn1

[Avasam]

For use with ldap3 and python-jose stubs 😃
Source: https://github.com/pyasn1/pyasn1/tree/db8f1a7930c6b5826357646746337dafc983f953/pyasn1

Ref: #9491

[AlexWaygood]

It looks like you removed a lot of __eq__ and __ne__ methods in b26e252 -- could you possibly add them back?

In general, we don't include methods or attributes in a subclass if they have the same signature as the same method or attribute as the superclass. But __eq__ and __ne__ methods are a bit special. Whether or not __eq__ is overridden on a subclass has a big impact on mypy's very useful --strict-equality option, for example. (I don't know if pyright does similar analysis.) For example, you can see that my proposal to remove decimal.Decimal.__eq__ in #6877 (comment) would have resulted in some false positives in pandas due to mypy's --strict-equality check.

In general, we need to be a lot more careful with dunder methods when it comes to removing them just because they're redundant overrides. E.g. python/mypy#13800 was caused by removing a few __hash__ methods in #8465, and I'm not sure anybody's been able to figure out exactly why yet!

[Avasam]

Oh 😯 No problem I'll add 'em back!

[AlexWaygood]

Thanks!

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉