The license was missing in most enterprise manifest so
the decision was taken to make it explicit in all cases.
The missing licenses were add in all version starting from
12.0 in repos odoo, enterprise and design-themes.
Starting from this commit, when a license is not defined,
a warning will be triggered.
closesodoo/odoo#74347
Signed-off-by: Xavier Dollé (xdo) <xdo@odoo.com>