Commits on Nov 4, 2024

1. [setup] Rewrite Ubuntu install_prereqs from the ground up …

   The existing from-source setup scripts are deprecated and will be
   removed after 2025-06-01:
   - setup/ubuntu/install_prereqs.sh
   - setup/ubuntu/source_distribution/install_prereqs_user_environment.sh
   
   Instead, users and developers should run setup/install_prereqs (not as
   root).
   
   Usability changes:
   - Fine-tuned log output, with option for --verbose (e.g., in CI).
   - Skip unnecessary steps; incremental runs are typically sub-second.
   
   Maintainability changes:
   - Always use files, not heredocs. (The pkg-config etc in a heredoc were
     documented as unwanted when using Drake's Debian packages, but that
     was wrong; we always want those deps even in Debian packages.)
   
   Website changes:
   - Major updates to from_source that explain how to install from CMake.
   
   A few cleanups macOS come along for the ride:
   - Remove useless binary_distribution_called_update shenanigans.
   - Remove vestigial i386 rcfile.
   - Abandon all hope of supporting 'brew install drake'.

   

   jwnimmer-tri committed Nov 4, 2024
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