Do not pull (yet): use boost-python instead of boost => with-python

:vertical_traffic_light: This should not be committed to master until homebrew/homebrew#30957 is
accepted.

Boost.Python support in Homebrew is moving from the boost formula to a
new boost-python formula. This commit updates formulas that were using
boost --with-python to use boost-python instead.

Closes #1080.