build optimized version of PETSc by default?
Currently, https://develop.openfoam.com/Development/ThirdParty-common/-/blob/master/makePETSC configures PETSc in debug mode.
We should add --with-debugging=0
unless some openFOAM debug build variable is on. PETSc will be up to 10x faster in non-debug mode. @mark ?