chore(substrait): bump to v0.74.0

[JazabC]

Update to Substrait v0.74.0

Bumps substrait submodule, adds builders __init__.py

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[mbrobbel]

Thanks @JazabC, #83 was just merged, is there anything in this PR we still want to get in before #82?
Edit: we can create another release with this if needed.

[JazabC]

Thanks @JazabC, #83 was just merged, is there anything in this PR we still want to get in before #82? Edit: we can create another release with this if needed.

Ah great, I was hoping to have the latest changes (builders, extension_registry etc.) in a new release. Aside from the substrait version bump, I added an __init__.py to substrait/builders/ to have it included in the build. (#87)