[FIX] packages: include missing data for l10n_mx
[FIX] packages: include missing data for l10n_mx

When building the enterprise packages, some data files were ignored.
With this commit, the demo data and missing xslt files are packaged.

This fixes #21045 and fixes #21015

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo