As module versions can be single digit, an upgrade script for version
`x.y.z`, is currently parsed as an upgrade script for module
version `z` in Odoo `x.y`.
However 3-digits module versions are more common than single-digit ones
and developers may expect the `x.y.x` upgrade scripts to be major-less
scripts.
This ambiguity can lift off if we accept module versions to be **only**
2-digits or 3-digits. This however make the `x.y.z` upgrade script
major-less. This can be fixed by renaming the script to `x.y.z.0`.
Part-of: odoo/odoo#118420
Christophe Simonis
653ec8cf60