Rebase the PR #1520 to ROCm repo. (#1574)

* Implement hiprtc for codegen tests

* Introduce gemm_softmax_gemm to codegen.

* Fix codegen build issues.

* Address PR comments.

* Separate ck_host lib and gemm_softmax_gemm into different PR.

* Fix cmake.

* Replace ENV variable with CMake option for toggling hipRTC in codegen
tests.

* Address PR comments.

* fix clang format

* Add missing header in magic_division.hpp

* - Workaround for hipRTC content wrapper
- Move descriptor for gemm_softmax_gemm to different branch

* Fix formatting.

* Revert "Fix formatting."

This reverts commit b5209eaef4.

* formatting fix

* fixed header guard issues

* updated header guards

* updated data_type for new types

* fixed redefinition error

* Add codegen test for batched_gemm_softmax_gemm.

Signed-off-by: Mirza Halilcevic <mirza.halilcevic@amd.com>

* formatting fix

---------

Signed-off-by: Mirza Halilcevic <mirza.halilcevic@amd.com>
Co-authored-by: Dino Musić <dino.music@htecgroup.com>
Co-authored-by: Mirza Halilcevic <mirza.halilcevic@htecgroup.com>
Co-authored-by: Po Yen Chen <PoYen.Chen@amd.com>
Co-authored-by: arai713 <67439843+arai713@users.noreply.github.com>
Co-authored-by: Astha Rai <astha.rai713@gmail.com>
Co-authored-by: Mirza Halilcevic <mirza.halilcevic@amd.com>

[ROCm/composable_kernel commit: 68a08c872e]

codegen/test/rtc/include/rtc/compile_kernel.hpp

@@ -12,8 +12,9 @@ namespace rtc {
 
 struct src_file
 {
+    src_file(std::filesystem::path p, std::string c) : path{std::move(p)}, content{std::move(c)} {}
     fs::path path;
-    std::string_view content;
+    std::string content;
 };
 
 struct compile_options
@@ -22,7 +23,7 @@ struct compile_options
     std::string kernel_name = "main";
 };
 
-kernel compile_kernel(const std::vector<src_file>& src,
+kernel compile_kernel(const std::vector<src_file>& srcs,
                       compile_options options = compile_options{});
 
 } // namespace rtc