Update boosted_bondi code

[brryan]

PR Summary

My version that compiles on chicoma. I returned src/pgen/bondi.cpp to its state in main and merged in the latest main. Note this will require a submodule update:

cd phoebus/external
rm -rf *
cd ../
git submodule update --init --recursive

Note that the git submodule command can be found in README.md for easy reference

PR Checklist

• Adds a test for any bugs fixed. Adds tests for new features.
• Format your changes by calling scripts/bash/format.sh.
• Explain what you did.