stdgpu: fix CUDA and HIP custom CMake modules

[valgur]

target_link_libraries() cannot be used with imported targets in some cases.

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 3 (edd675bc8f4d340df3e31c190e07c8bc2d4d6dd1):

• stdgpu/cci.20230913:
  All packages built successfully! (All logs)

• stdgpu/1.3.0:
  All packages built successfully! (All logs)

---

Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 3 (edd675bc8f4d340df3e31c190e07c8bc2d4d6dd1):

• stdgpu/cci.20230913:
  All packages built successfully! (All logs)

• stdgpu/1.3.0:
  All packages built successfully! (All logs)

[uilianries]

@valgur Thank you for your PR, could please update this PR description with more information? What's trying to fix, do you have a build log? The current PR does not targets an issue or more detailed case.

[valgur]

@uilianries Before applying valgur/cupoch@1f173b8 the build failed with

-- Conan: Including build module from '.conan2/p/b/stdgp2af260a75bda9/p/lib/cmake/stdgpu-dependencies-cuda.cmake'
CMake Error at .conan2/p/b/stdgp2af260a75bda9/p/lib/cmake/stdgpu-dependencies-cuda.cmake:5 (target_link_libraries):
  Cannot specify link libraries for target "stdgpu::stdgpu" which is not
  built by this project.
Call Stack (most recent call first):
  build/Release/build/Release/generators/stdgpu-config.cmake:37 (include)
  src/cupoch/collision/CMakeLists.txt:8 (find_package)

[uilianries]

@uilianries Before applying valgur/cupoch@1f173b8 the build failed with

-- Conan: Including build module from '.conan2/p/b/stdgp2af260a75bda9/p/lib/cmake/stdgpu-dependencies-cuda.cmake'
CMake Error at .conan2/p/b/stdgp2af260a75bda9/p/lib/cmake/stdgpu-dependencies-cuda.cmake:5 (target_link_libraries):
  Cannot specify link libraries for target "stdgpu::stdgpu" which is not
  built by this project.
Call Stack (most recent call first):
  build/Release/build/Release/generators/stdgpu-config.cmake:37 (include)
  src/cupoch/collision/CMakeLists.txt:8 (find_package)

@valgur Which build? I don't find any other issue or PR related to stdgpu. The past PR for stdgpu in CCI did not fail to link cmake targets in test package. Please, add details about the error, you can use the issue template. As we are using a custom cmake file, it could be used as information for similar cases in CCI. Please, always add context and details in the PR description.