feature: option to skip built-in assertions

[quassy]

We have a lot of built-in assertions on our columns which makes developing our models expensive. Most of the time it's not necessary to run these assertions until the final PR, so it would be great if it was possible to deactivate them in dataform compile, maybe even by type of assertion:

dataform compile --disable-assertions=true  # disable all assertions
dataform compile --disable-assertions=uniqueKey,nonNull  # disable checks for primary keys and required values
dataform compile --disable-assertions=uniqueKey
dataform compile --disable-assertions=rowConditions
dataform compile --disable-assertions=nonNull
dataform compile --disable-assertions=manual  # not sure how this should affect dependants