package/luainterpreter: gather the ABI version string defaults

Now that we have booleans to represent the Lua ABI version, and that
every Lua providers do select those, there is no longer any reason
for them to also handle the ABI version string anymore.

Move the defaults into the common luainterpreter.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: James Hilliard <james.hilliard1@gmail.com>
Cc: Francois Perrad <francois.perrad@gadz.org>