refactor examples and tests #815

Job	Run time
clang-format	18s
linux_clang-14_cuda-11.2_debug_analysis	15m 48s
windows_cl-2022_debug_analysis	2h 30m 14s
macos_xcode-14.2_debug_analysis	24m 54s
linux_gcc-12_debug_analysis	18m 53s
macos_xcode-14.2_release	19m 58s
macos_xcode-14.3.1_debug	17m 24s
windows_cl-2022_release	2h 27m 30s
windows_cl-2022_debug	2h 25m 54s
linux_gcc-9_debug	18m 0s
linux_gcc-12_release_c++20	17m 8s
linux_gcc-13_debug	18m 56s
linux_clang-10_release	13m 27s
linux_clang-12_release	35m 14s
linux_clang-13_debug	12m 6s
linux_clang-16_debug_ubsan	15m 0s
linux_clang-16_debug_tsan	13m 25s
	11h 24m 9s

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