T004: Switch to use fingerprint generators

[greglandrum]

Description

It's now recommended to use the RDKit's fingerprint generator interface whenever possible instead of calling the individual fingerprinting functions. This PR updates Tutorial 4 to use fingerprint generators in the way that I currently recommend.

Unfortunately there is not (yet?) a fingerprint generator for the MACCS keys, so I've only changed things for the Morgan fingerprints.

I made a couple of other small changes to the talktorial... hopefully you like those too. :-)

Todos

Notable points that this PR has either accomplished or will accomplish.

• [x] Switch to using the fingerprint generator interface to generate Morgan fingerprints

Questions

Status

• [ ] Ready to go

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[AndreaVolkamer]

@greglandrum thanks a lot! The changes look great!

@hamzaibrahim21 can you please apply the change also to all other notebooks where applicable.