MAINT, TST: sup warning for theilslopes
MAINT, TST: sup warning for theilslopes

* suppress rather than check for a warning
in `test_theilslopes_warnings()` because
the warning does not show up for 32-bit Windows
with at least some versions of NumPy (issue
for wheels repo)

WarrenWeckesser/scipy,ilayn/scipy,endolith/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,Stefan-Endres/scipy,andyfaff/scipy,mdhaber/scipy,mdhaber/scipy,scipy/scipy,andyfaff/scipy,mdhaber/scipy,perimosocordiae/scipy,ilayn/scipy,andyfaff/scipy,endolith/scipy,WarrenWeckesser/scipy,mdhaber/scipy,WarrenWeckesser/scipy,mdhaber/scipy,endolith/scipy,andyfaff/scipy,rgommers/scipy,Stefan-Endres/scipy,andyfaff/scipy,anntzer/scipy,anntzer/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,mdhaber/scipy,scipy/scipy,scipy/scipy,scipy/scipy,rgommers/scipy,Stefan-Endres/scipy,anntzer/scipy,WarrenWeckesser/scipy,endolith/scipy,ilayn/scipy,anntzer/scipy,scipy/scipy,rgommers/scipy,WarrenWeckesser/scipy,ilayn/scipy,ilayn/scipy,endolith/scipy,Stefan-Endres/scipy,endolith/scipy,perimosocordiae/scipy,ilayn/scipy,scipy/scipy,rgommers/scipy,rgommers/scipy,anntzer/scipy,perimosocordiae/scipy,anntzer/scipy,perimosocordiae/scipy,andyfaff/scipy,Stefan-Endres/scipy