Change build.yaml to use clang-format-18

[jwrober]

Closes #2417

[lmoureaux]

Will need to reformat the code as well

[jwrober]

The instructions for the action says that the check only tests the changes in the PR. So I wasn't thinking that we needed to reformat the whole tree.

[blabber]

Commandline to bulk reformat the code (excluding dependencies). clang-format18 is the name of the tool in FreeBSD, adapt as needed.

find . \! -path './dependencies/*' -type f \( -name '*.hpp' -o -name '*.h' -o -name '*.cpp' -o -name '*.c' \) \
    | xargs clang-format18 -i

[jwrober]

Ok I need to revert that last commit. We have a chicken and egg problem. I need the action to update first and then update the code after its committed

[jwrober]

I'm going to start over. Closing