Odoo Release Updates

[IMP] html_builder, *: rename the o_editable class by o_savable

[FIX] marketing_card: raise on failed image render

[CLN] *: manifests

[FIX] marketing_card: mark preview cards as requiring sync on update

[FIX] *: automaticaly set legacy at_install

[IMP] tests: Use a savepoint for assertRaisesRegex

[REF] *: use ir.config_parameter new API get_xxx, set_xxx

[REF] mass_mailing, *: use html Builder instead of OdooEditor