Since this old commit 73592487, the files that are packaged are
chosen by a list of allowed extensions. This list have to be maintained
each time that a developer adds a new kind of file in a module. This is
error prone [0] as most developer are not aware of that and it's difficult
to monitor.

Moreover, there is no reason to have a different list of installed files
when one install from the git repo instead of the source package.

With this commit, all [1] odoo sources files are included in the source
packaging and the only thing to maintain is a small black-list of file
extensions like for Python bytecode files and for version control files.

[0] see commit d33c05b6 that fix `.json` missing files.
[1] graft command: https://docs.python.org/3/distutils/commandref.html



closes odoo/odoo#66996

Signed-off-by: Xavier Dollé (xdo) <xdo@odoo.com>