Add option to disable dual reductions for Clp #242

Job	Run time
Run tests (ubuntu-20.04, true, ADD_CXXFLAGS=-fvisibility=hidden, sudo apt install -y -qq gfortran...	7m 39s
Run tests (ubuntu-20.04, false, ADD_CXXFLAGS=-fvisibility=hidden, sudo apt install -y -qq gfortra...	7m 28s
Run tests (ubuntu-22.04, true, ADD_CXXFLAGS=-fvisibility=hidden, sudo apt install -y -qq gfortran...	7m 50s
Run tests (ubuntu-22.04, false, ADD_CXXFLAGS=-fvisibility=hidden, sudo apt install -y -qq gfortra...	7m 57s
Run tests (macos-13, false, CC=clang OSX=13, brew install metis bash)	9m 44s
Run tests (macos-13, false, CC=gcc-13 CXX=g++-13 OSX=13, brew install metis bash)	11m 55s
	52m 33s

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