Fail water balance check on either tolerance

[visr]

Part of #1853; #1853 (comment)

[evetion]

Good luck with finding new tolerances, nice PR just before 1.0! ❤️

[visr]

Doesn't need to be merged before 1.0. Could have if it didn't give issues.
This is on pump_discrete_control, relative error is too high, but absolute error is tiny:

┌ Error: Too large water balance error
│   id = Basin #1
│   balance_error = -4.1119371282413245e-20
│   relative_error = -0.10526315789473695
└ @ Ribasim ~/work/Ribasim/Ribasim/core/src/callback.jl:316

[Huite]

Uh, oops, I might've been shooting from the hip there. I was thinking of acceptance rather than rejection!

What I discussed with @SouthEndMusic earlier: if the absolute error is tiny, you probably want to accept, right?
Hence the earlier implementation. Since && short-circuits, it won't look at the relative error if the absolute error is already okay.