Split CMake RDC utilities from Celeritas macros (#1104)

* cmake: Use cuda_rdc_* for CUDA relocatable device code support

* cmake: add celeritas_target_compile_options wrapper

* Apply POSITION_INDEPENDENT_CODE only to the object library

* Do not use cuda_rdc if USE_VECGEOM is false

* Install CudaRdcUtils.cmake

* Add more celeritas rdc wrappers and fix existing ones.

* Re-add CeleritasLibrary.cmake for backwark compatibility.

Add missing install of CeleritasUtils.cmake

* Add celeritas_sources_contains_cuda

* Fix typo in doc/comment

* Update exampes, library usage

* Fix variable being set in parent scope by using macros to forward

* Also don't use if not CUDA

* Fix typo in documentation.

Co-authored-by: Seth R. Johnson <johnsonsr@ornl.gov>

* Correct implementation of cuda_rdc_add_library for ALIAS

* Add support for ALIAS in cuda_rdc_get_sources_and_options

* Avoid FindCUDA's version by renaming cuda_[rdc_]get_sources_and_options

CMakeLists.txt

@@ -23,7 +23,7 @@ if(CMAKE_VERSION VERSION_LESS 3.18)
 endif()
 
 include(GNUInstallDirs)
-include(CeleritasLibrary)
+include(CudaRdcUtils)
 include(CeleritasUtils)
 include(CMakeDependentOption)
 include(CMakePackageConfigHelpers)
@@ -229,8 +229,8 @@ endif()
 celeritas_set_default(CMAKE_INSTALL_MESSAGE LAZY)
 
 #----------------------------------------------------------------------------#
-# Output locations for Celeritas products (used by CeleritasLibrary.cmake,
-# CeleritasUtils.cmake, install code below) will mirror the installation layout
+# Output locations for Celeritas products (used by CeleritasUtils.cmake and
+# install code below) will mirror the installation layout
 set(CELERITAS_CMAKE_CONFIG_DIRECTORY
   "${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}/cmake")
 set(CELERITAS_HEADER_CONFIG_DIRECTORY
@@ -525,6 +525,7 @@ set(CELERITAS_INSTALL_CMAKECONFIGDIR
 
 # Build list of CMake files to install
 set(_cmake_files
+  "${PROJECT_SOURCE_DIR}/cmake/CudaRdcUtils.cmake"
   "${PROJECT_SOURCE_DIR}/cmake/CeleritasLibrary.cmake"
 )
 foreach(_dep Geant4 HepMC3 ROOT VecGeom)