NRPF improvement: change real to complex calculation in Jacobian #3755

Job	Run time
Build sdist and set version	31s
build-cpp-test-macos (debug)	15m 36s
build-cpp-test-windows (debug, msvc)	11m 45s
build-cpp-test-macos (release)	20m 4s
build-cpp-test-windows (debug, clang-cl)	18m 46s
Build and test in Conda (ubuntu)	2m 32s
build-cpp-test-windows (release, msvc)	19m 11s
Build and test in Conda (windows)	6m 29s
build-cpp-test-windows (release, clang-cl)	21m 10s
build-cpp-test-linux (debug, gcc)	17m 19s
build-cpp-test-linux (debug, clang)	11m 24s
build-cpp-test-linux (release, gcc)	35m 47s
build-cpp-test-linux (release, clang)	17m 48s
build-and-test-python (linux-x64)	10m 33s
build-and-test-python (linux-aarch64)	34m 24s
build-and-test-python (macos)	8m 46s
build-and-test-python (windows)	12m 13s
test-python-macos-arm64	0s
publish-wheels	11s
	4h 24m 29s

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