webp: add --universal

Closes #25124.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
hercurles: retain la files

Closes #25128.
Set bottle version rather than re-parse it from the URL
brew-bundle: update usage info and move to --help function

Follow-up to 6697ff6c9d0d4301adfbb7c76628808a63f1324b

Closes #25130.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>