As nvbench.main links to nvbench as INTERFACE only, it no longer consumes usage reqs of nvbench

Because of this nvbench.main was no longer consuming dependence on CUDA::toolkit include dirs.

This PR creates a small interface target for NVBench’s public deps (CUDA/CUPTI/NVML) and links
it to nvbench.main privately, while keeping NVBench headers SYSTEM only on nvbench.

Author: oleksandr-pavlyk

nvbench/CMakeLists.txt

@@ -95,6 +95,11 @@ target_link_libraries(nvbench
     nvbench_json
 )
 
+# Public dependency interface to re-use on internal targets without
+# making NVBench headers system for those builds.
+add_library(nvbench.public_deps INTERFACE)
+target_link_libraries(nvbench.public_deps INTERFACE ${ctk_libraries})
+
 # ##################################################################################################
 # * conda environment -----------------------------------------------------------------------------
 rapids_cmake_support_conda_env(conda_env MODIFY_PREFIX_PATH)
@@ -124,6 +129,8 @@ add_library(nvbench.main OBJECT main.cu)
 nvbench_config_target(nvbench.main)
 # Propagate `nvbench` to consumers but keep NVBench's own build warning-visible.
 target_link_libraries(nvbench.main INTERFACE nvbench)
+# Ensure CUDA/CUPTI/NVML include dirs are visible for nvbench.main's build.
+target_link_libraries(nvbench.main PRIVATE nvbench.public_deps)
 # Add NVBench's headers privately so the object library itself sees warnings.
 target_include_directories(nvbench.main
   PRIVATE