[Merged by Bors] - chore(algebra/ring/basic): generalize is_domain.to_cancel_monoid_with_zero
to no_zero_divisors
#11387
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This generalization doesn't work for typeclass search as
cancel_monoid_with_zero
impliesno_zero_divisors
which would form a loop, but it can be useful for aletI
in another proof.Independent of whether this turns out to be useful, it's nice to show that nontriviality doesn't affect the fact that rings with no zero divisors are cancellative.