Switch from optparse to argparse

LLNL / serac

Serac is a high order nonlinear thermomechanical simulation code

BSD 3-Clause "New" or "Revised" License

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Closed chapman39 closed 1 month ago

chapman39 commented 1 month ago

The build scripts in scripts/llnl have been using optparse which is deprecated. This small PR switches to argparse.