add test for one-shot encoding/decoding with offset #568

Job	Run time
Build and test cmake:gcc9	26s
Build and test cmake:clang15	34s
Build and test cmake:clang15:asan	49s
Build and test cmake:clang15:tsan	42s
Build and test cmake:clang15:ubsan	53s
Build and test cmake:qemu-arm-neon-gcc	59s
Build and test cmake-osx:clang	50s
Build and test cmake-osx:gcc	44s
Build and test cmake-win64:msvc2019-rel	53s
Build and test cmake-win64:msvc2019-dbg	1m 27s
Build and test fuzz:clang15	36s
Build and test python3.10:clang15	1m 42s
Build and test python3.10-win	34s
Build and test maven	50s
Build and test bazel:root	35s
Build and test bazel:go	21s
Build and test bazel:java	2m 56s
Build and test bazel:research	27s
Build and test bazel-osx:root	1m 8s
Build and test bazel-osx:go	1m 26s
Build and test bazel-osx:java	3m 10s
Build and test bazel-osx:research	1m 28s
Build and test bazel-win:root	1m 52s
Build and test bazel-win:java	2m 3s
Build and test bazel-win:research	51s
	28m 16s

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