DAEProblem support

[oxinabox]

The docs say it supports

Differential algebraic equations (DAEs) (DAEProblem and ODEProblem with mass matrices)

but in the DAE example there is only one for the ODEProblem with mass matrix.
https://docs.sciml.ai/SciMLSensitivity/stable/examples/dae/physical_constraints/

Speaking to @ChrisRackauckas he says DAEProblem isn't supported.

I don't think this is a huge deal since can always reduce a DAE into an ODEProblem with a mass matrix
but for some problems the DAEProblem with IDA is significantly faster than the next best ODE Solver with an ODEProblem that we have found.