Tune FACTOR_ERATMEDIUM for AMD Zen 4 #183

Job	Run time
linux_clang (ubuntu-latest, Debug)	3m 23s
linux_gcc (ubuntu-latest, Debug)	4m 26s
linux_clang (ubuntu-latest, Release)	1m 26s
linux_gcc_valgrind	1m 8s
linux_gcc (ubuntu-latest, Release)	2m 22s
linux_gcc_sanitizers	2m 21s
macos_clang (macos-latest, Debug)	2m 53s
windows_msvc2022	2m 28s
macos_clang (macos-latest, Release)	2m 26s
windows_mingw64 (windows-latest, Debug)	5m 12s
windows_mingw64 (windows-latest, Release)	2m 59s
	31m 4s

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