Changes to remove pybind11 out of most of utils headers

Since utils headers are used in kernels, to make kernels/ independent
of pybind11, it is necessary to ensure that all depedent header files
also do not include pybind11.

Changed offset_utils to use dpctl::tensor::ssize_t instead of py::ssize_t.

Factored out pybind11 independent components of type_dispatch.hpp header
into type_dispatch_building.hpp . What remains uses dpctl4pybind11 and hence
genuinely depends on pybind11.

Author: oleksandr-pavlyk

dpctl/tensor/libtensor/include/kernels/accumulators.hpp

@@ -32,7 +32,7 @@
 
 #include "dpctl_tensor_types.hpp"
 #include "utils/offset_utils.hpp"
-#include "utils/type_dispatch.hpp"
+#include "utils/type_dispatch_building.hpp"
 
 namespace dpctl
 {

dpctl/tensor/libtensor/include/kernels/boolean_advanced_indexing.hpp

@@ -31,7 +31,7 @@
 
 #include "dpctl_tensor_types.hpp"
 #include "utils/offset_utils.hpp"
-#include "utils/type_dispatch.hpp"
+#include "utils/type_dispatch_building.hpp"
 
 namespace dpctl
 {

dpctl/tensor/libtensor/include/kernels/boolean_reductions.hpp

@@ -34,7 +34,7 @@
 #include "dpctl_tensor_types.hpp"
 #include "utils/offset_utils.hpp"
 #include "utils/sycl_utils.hpp"
-#include "utils/type_dispatch.hpp"
+#include "utils/type_dispatch_building.hpp"
 #include "utils/type_utils.hpp"
 
 namespace dpctl

dpctl/tensor/libtensor/include/kernels/clip.hpp

@@ -33,7 +33,6 @@
 #include "kernels/alignment.hpp"
 #include "utils/math_utils.hpp"
 #include "utils/offset_utils.hpp"
-#include "utils/type_dispatch.hpp"
 #include "utils/type_utils.hpp"
 
 namespace dpctl
@@ -45,8 +44,6 @@ namespace kernels
 namespace clip
 {
 
-namespace td_ns = dpctl::tensor::type_dispatch;
-
 using namespace dpctl::tensor::offset_utils;
 
 using dpctl::tensor::kernels::alignment_utils::

dpctl/tensor/libtensor/include/kernels/elementwise_functions/abs.hpp

@@ -36,7 +36,7 @@
 
 #include "kernels/dpctl_tensor_types.hpp"
 #include "utils/offset_utils.hpp"
-#include "utils/type_dispatch.hpp"
+#include "utils/type_dispatch_building.hpp"
 #include "utils/type_utils.hpp"
 
 namespace dpctl

dpctl/tensor/libtensor/include/kernels/elementwise_functions/acos.hpp

@@ -34,7 +34,7 @@
 
 #include "kernels/dpctl_tensor_types.hpp"
 #include "utils/offset_utils.hpp"
-#include "utils/type_dispatch.hpp"
+#include "utils/type_dispatch_building.hpp"
 #include "utils/type_utils.hpp"
 
 namespace dpctl

dpctl/tensor/libtensor/include/kernels/elementwise_functions/acosh.hpp

@@ -34,7 +34,7 @@
 
 #include "kernels/dpctl_tensor_types.hpp"
 #include "utils/offset_utils.hpp"
-#include "utils/type_dispatch.hpp"
+#include "utils/type_dispatch_building.hpp"
 #include "utils/type_utils.hpp"
 
 namespace dpctl

dpctl/tensor/libtensor/include/kernels/elementwise_functions/add.hpp

@@ -31,7 +31,7 @@
 
 #include "sycl_complex.hpp"
 #include "utils/offset_utils.hpp"
-#include "utils/type_dispatch.hpp"
+#include "utils/type_dispatch_building.hpp"
 #include "utils/type_utils.hpp"
 
 #include "kernels/dpctl_tensor_types.hpp"

dpctl/tensor/libtensor/include/kernels/elementwise_functions/angle.hpp

@@ -35,7 +35,7 @@
 
 #include "kernels/dpctl_tensor_types.hpp"
 #include "utils/offset_utils.hpp"
-#include "utils/type_dispatch.hpp"
+#include "utils/type_dispatch_building.hpp"
 #include "utils/type_utils.hpp"
 
 namespace dpctl

dpctl/tensor/libtensor/include/kernels/elementwise_functions/asin.hpp

@@ -34,7 +34,7 @@
 
 #include "kernels/dpctl_tensor_types.hpp"
 #include "utils/offset_utils.hpp"
-#include "utils/type_dispatch.hpp"
+#include "utils/type_dispatch_building.hpp"
 #include "utils/type_utils.hpp"
 
 namespace dpctl