Make tap_pos optional #4561

Job	Run time
build-cpp-test-macos (debug)	2m 16s
Build sdist and set version	31s
build-cpp-test-macos (release)	2m 17s
Build and test in Conda (ubuntu)	2m 12s
build-cpp-test-linux (debug, gcc)	2m 13s
Build and test in Conda (windows)	1m 59s
build-cpp-test-linux (debug, clang)	2m 12s
build-cpp-test-windows (debug, msvc)	2m 8s
build-cpp-test-linux (release, gcc)	2m 13s
build-cpp-test-windows (debug, clang-cl)	2m 11s
build-cpp-test-linux (release, clang)	2m 15s
build-cpp-test-windows (release, msvc)	2m 9s
build-cpp-test-windows (release, clang-cl)	2m 9s
build-and-test-python (linux-x64)	1m 37s
build-and-test-python (linux-aarch64)	1m 37s
build-and-test-python (macos)	1m 39s
build-and-test-python (windows)	1m 21s
publish-wheels	2s
	33m 1s

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