Per discussion at the unconference[0], I started to write a patch that
removes the make distprep target. A more detailed explanation of the
rationale is also in the patch.
It needs some polishing around the edges, but I wanted to put it out
here to get things moving and avoid duplicate work.
One thing in particular that isn't clear right now is how "make world"
should behave if the documentation tools are not found. Maybe we should
make a build option, like "--with-docs", to mirror the meson behavior.
[0]:
https://wiki.postgresql.org/wiki/PgCon_2023_Developer_Unconference#Build_System
