CI: enable nvcc + clang host compiler

[SimeonEhrig]

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[psychocoderHPC]

Adding the follwoing patch is changing the error for the deprecated copy to a warning

diff --git a/cmake/alpakaCompilePedantic.cmake b/cmake/alpakaCompilePedantic.cmake
index 6501e0e5..eaf7f519 100644
--- a/cmake/alpakaCompilePedantic.cmake
+++ b/cmake/alpakaCompilePedantic.cmake
@@ -27,6 +27,14 @@ if(TARGET alpaka_target_cuda)
             # avoid `declared with greater visibility than the type of its field` with nvcc 12.8+
             alpaka_set_compiler_options(DEVICE target alpaka_target_cuda "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Wno-attributes>")
         endif()
+        if(${_alpaka_CUDA_HOST_COMPILER} STREQUAL "Clang")
+            alpaka_set_compiler_options(
+                    DEVICE
+                    target
+                    alpaka_target_cuda
+                    "$<$<CXX_COMPILER_ID:Clang>:SHELL:-Xcompiler=-Wno-error=deprecated-copy>"
+            )
+        endif()
     endif()
 endif()

This will not solve the fact that most runtime tests will fail. nvcc+clang is generating empty kernels if all kernel parameters are defined auto, a workaround is to have at least one template<typename T_Acc>.
Another workaround is defining the kernel functor constexpr operator()(auto const &acc) and not using ALPAKA_FN_ACC. This is only works for kernels without printf() in the body.