automation: add extra arguments when building Inno
These were being fed into the template expansion but not being
used. This meant --version was not getting set when it should have
been.
Differential Revision: https://phab.mercurial-scm.org/D8482
packaging: add -python2 to Windows installer filenames
We just taught the Windows installers to produce Python 3 variants
built with PyOxidizer.
Our plan is to publish both Python 2 and Python 3 versions of the
installers for Mercurial 5.4.
This commit teaches the Inno and WiX installers to add an optional
string suffix to the installer name. On Python 2, that suffix is
"-python2." We reserve the existing name for the Python 3 installers,
which we want to make the default.
Differential Revision: https://phab.mercurial-scm.org/D8479