Unit test coverage gaps

[e10harvey]

While working on #1987 and #1982, it became clear that not all of the gemv code paths are tested via the gemv unit tests. Upon closer inspection of the gemv unit test, it appears that many of the blas unit tests rely on the strided_view_adapter which always tests our interfaces with LayoutRight views regardless of the provided ViewType. The following unit tests are affected by this:

blas/unit_test/Test_Blas1_abs.hpp
blas/unit_test/Test_Blas1_asum.hpp
blas/unit_test/Test_Blas1_axpby.hpp
blas/unit_test/Test_Blas1_axpby_unification.hpp
blas/unit_test/Test_Blas1_axpy.hpp
blas/unit_test/Test_Blas1_dot.hpp
blas/unit_test/Test_Blas1_iamax.hpp
blas/unit_test/Test_Blas1_mult.hpp
blas/unit_test/Test_Blas1_nrm1.hpp
blas/unit_test/Test_Blas1_nrm2.hpp
blas/unit_test/Test_Blas1_nrm2_squared.hpp
blas/unit_test/Test_Blas1_nrm2w.hpp
blas/unit_test/Test_Blas1_nrm2w_squared.hpp
blas/unit_test/Test_Blas1_nrminf.hpp
blas/unit_test/Test_Blas1_reciprocal.hpp
blas/unit_test/Test_Blas1_scal.hpp
blas/unit_test/Test_Blas1_sum.hpp
blas/unit_test/Test_Blas1_team_abs.hpp
blas/unit_test/Test_Blas1_team_axpby.hpp
blas/unit_test/Test_Blas1_team_axpy.hpp
blas/unit_test/Test_Blas1_team_dot.hpp
blas/unit_test/Test_Blas1_team_mult.hpp
blas/unit_test/Test_Blas1_team_nrm2.hpp
blas/unit_test/Test_Blas1_team_scal.hpp
blas/unit_test/Test_Blas1_team_update.hpp
blas/unit_test/Test_Blas1_update.hpp
blas/unit_test/Test_Blas2_gemv.hpp
blas/unit_test/Test_Blas2_ger.hpp
blas/unit_test/Test_Blas2_syr.hpp
blas/unit_test/Test_Blas2_syr2.hpp

To address this, strided_view_adapter could be updated to accept and use a LayoutType template argument.