[IMP] api: add new decorators `model_cr` and `model_cr_context`
[IMP] api: add new decorators `model_cr` and `model_cr_context`

Those decorators will be useful for converting to the new API methods that only
take `self`, `cr`, and possibly `context`.

dfang/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,dfang/odoo,ygol/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,hip-odoo/odoo,ygol/odoo,dfang/odoo,ygol/odoo,dfang/odoo,dfang/odoo,hip-odoo/odoo,dfang/odoo,hip-odoo/odoo