Eigen version moved in 5.x.x, find version for both 3.x.x and 5.x.x #1432

Job	Run time
macos-latest: clang++ Release Pthreads	26m 11s
ubuntu-24.04: /usr/bin/g++-14 Release Pthreads	26m 47s
ubuntu-24.04: /usr/bin/g++-14 Release PaRSEC	5m 40s
macos-latest: clang++ Release PaRSEC	14m 21s
ubuntu-24.04: /usr/bin/g++-14 Debug PaRSEC	23m 57s
macos-latest: clang++ Debug Pthreads	24m 55s
ubuntu-24.04: /usr/bin/g++-14 Debug Pthreads	25m 54s
macos-latest: clang++ Debug PaRSEC	25m 35s
	2h 53m 20s

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