Add several missing source files to _no_fast_math_sources

Adds copy_and_cast_usm_to_usm.cpp, where.cpp, and _boolean_reduction_sources to _no_fast_math_sources

This is intended to fix discrepancies with NaNs on CUDA backend

Author: ndgrigorian

dpctl/tensor/CMakeLists.txt

@@ -199,15 +199,18 @@ if (WIN32)
 endif()
 
 set(_no_fast_math_sources
+  ${CMAKE_CURRENT_SOURCE_DIR}/libtensor/source/copy_and_cast_usm_to_usm.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/libtensor/source/full_ctor.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/libtensor/source/linear_sequences.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/libtensor/source/clip.cpp
+  ${CMAKE_CURRENT_SOURCE_DIR}/libtensor/source/where.cpp
 )
 list(APPEND _no_fast_math_sources
      ${_elementwise_sources}
      ${_reduction_sources}
      ${_sorting_sources}
      ${_linalg_sources}
+     ${_boolean_reduction_soruces}
 )
 
 foreach(_src_fn ${_no_fast_math_sources})