Merge pull request #14751 from masterleinad/clang_cuda

Fix compiling for the Kokkos CUDA backend using clang

diff --cc .github/workflows/linux.yml
Simple merge

diff --cc include/deal.II/base/numbers.h
Simple merge

diff --cc include/deal.II/base/symmetric_tensor.h
Simple merge

diff --cc include/deal.II/base/tensor.h
Simple merge

diff --cc include/deal.II/lac/read_write_vector.h
Simple merge