use constexpr for defining is_row_major

Author: Vahid Tavanashad

dpnp/backend/extensions/blas/gemm.cpp

@@ -232,7 +232,7 @@ std::tuple<sycl::event, sycl::event, bool>
 
 // cuBLAS supports only column-major storage
 #if defined(USE_ONEMATH_CUBLAS)
-    const bool is_row_major = false;
+    constexpr bool is_row_major = false;
 
     transA = is_matrixA_c_contig ? oneapi::mkl::transpose::T
                                  : oneapi::mkl::transpose::N;

dpnp/backend/extensions/blas/gemm_batch.cpp

@@ -307,7 +307,7 @@ std::tuple<sycl::event, sycl::event, bool>
 
 // cuBLAS supports only column-major storage
 #if defined(USE_ONEMATH_CUBLAS)
-    const bool is_row_major = false;
+    constexpr bool is_row_major = false;
 
     transA = A_base_is_c_contig ? oneapi::mkl::transpose::T
                                 : oneapi::mkl::transpose::N;

dpnp/backend/extensions/blas/gemv.cpp

@@ -187,7 +187,7 @@ std::pair<sycl::event, sycl::event>
 
 // cuBLAS supports only column-major storage
 #if defined(USE_ONEMATH_CUBLAS)
-    const bool is_row_major = false;
+    constexpr bool is_row_major = false;
     std::int64_t m;
     std::int64_t n;