MueLu TentativePFactory_kokkos: Add no-QR option for NSDim>1
Created by: cgcgcg
@trilinos/muelu
Description
Add no-QR option for nullspaces of dimension > 1 to MueLu_TentativePFactory_kokkos
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Motivation and Context
The current QR implementation allocates too much scratch memory for RefMaxwell runs on Cuda which leads to an error. Disabling the QR altogether can circumvent this issue until we have a better Kokkos QR. The default behavior has not been changed.