testtablespace is an extra path used as tablespace location in the main
regression test suite, computed from --outputdir as defined by the
caller of pg_regress (current directory if undefined).
This special handling was introduced as of f10589e to be specific to
MSVC, as we let pg_regress' Makefile handle this cleanup in other
environments. This moves the cleanup to the MSVC script running
regression tests instead where needed: check, installcheck and
upgradecheck. I have also checked this patch on MSVC with repeated runs
of each target.
Author: Kyotaro Horiguchi, Michael Paquier
Discussion: https://postgr.es/m/20200219.142519.437573253063431435.horikyota.ntt@gmail.com
2b2a070d98