bv-to-int: change order of passes (#5208)

bv-to-int: change order of passes (#5208)

Closes #5095 and replaces #5110.
There are two tests in #5095 that produce two different assertion failures when using bv-to-int.
The first happens because the substitution map wasn't applied after the pass.
The second happens because div (that is introduced in the pass) is not rewritten using witness.
Both problems are solved by making sure that apply-substs, theory-preprocess and ite-removal are executed after bv-to-int.
The two tests from #5095 are included as regressions.