Update tutorial notebooks to include references to MMC / BMC

[ndharasz]

• update all notebooks to install and use numerai-tools scoring functions
• update hello_numerai to to also score created model against MMC
• update feature_neutralization to use numerai-tools neutralization and score MMC
• update target_ensemble to use target teager and score against MMC/BMC
• delete unused requirements files
• mark utils.py as soft deprecated and link to numerai-tools

[idan192]

First of all, looks great overall! I think Egi's inputs on Slack are good but I like the format.

Few questions:

• I see warning messages about missing lida requirements, should we address it?
• Should we move get_mmc into numerai_tools?
• Should we update these notebooks with v4.3 data instead of v4.2 so they don't apply all these changes and then again change everything in a week, or do we prefer a separate PR?

👍

[ndharasz]

Thanks for the feedback, here are my thoughts:

• I tried to quiet these, but the notebook still seems to work with the warnings, so I kept as-is to reduce the number of lines that needed reviewing. I'll add a card to the backlog to revisit and try to solve these errors after I upgrade all of our python envs to modern stuff.
• I think we could add helper / convenience methods to numerai-tools, I'll add this to the same card as above.
• Let's make a separate PR to keep things simpler and isolate any potential issues.