[postgis-devel] Upgrade paths (again)

[Regina Obe]

> You're right that the "duplicated files" is a windows only issue, but I'm
also
> concerned about increasing number of symlinks...
> 
> --strk;

Just a note, whatever we decide cannot go into PostGIS 3.3.0 cause we aren't
changing the configure or introducing new install targets and we really need
to get to rc1 soon to make the PostgreSQL 15 cut. 

Thanks,
Regina