use link time optimization for CI release build #6106

Job	Run time
Build sdist and set version	15s
build-cpp-test-windows (debug, msvc)	9m 45s
build-cpp-test-linux (debug, gcc)	11m 16s
build-cpp-test-windows (debug, clang-cl)	12m 13s
build-cpp-test-linux (debug, clang)	9m 36s
build-cpp-test-windows (release, msvc)	14m 30s
build-cpp-test-linux (release, gcc)	11m 26s
build-cpp-test-windows (release, clang-cl)	12m 7s
build-cpp-test-macos (debug)	7m 36s
build-cpp-test-linux (release, clang)	12m 11s
Build and test in Conda (ubuntu)	2m 32s
build-cpp-test-macos (release)	6m 44s
Build and test in Conda (windows)	6m 21s
build-and-test-python (linux-x64)	9m 9s
build-and-test-python (linux-aarch64)	4m 23s
build-and-test-python (macos)	6m 24s
build-and-test-python (windows)	8m 25s
publish-wheels	11s
	2h 25m 4s

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