Odoo Release Updates

[FIX] sale_subscription: correct invoiced amount for downpayment on upsell order

[IMP] base: Warning on unused attributes in ir.qweb

[FIX] sale_subscription: fetch only active company

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

[IMP] base,all: remove deprecated 't-esc' ir.qweb directive

[IMP] orm: prevent use of falsy ids

[FIX] sale_subscription: remove unwanted xpath attribute change

[FIX] sale_subscription: fix invoice combo section issue

[FIX] sale_subscription: align next invoice date of postpaid

[FIX] sale_subscription: ensure free contract lose the invoice flag

[CLN] sale_subscription: Clean optional products tests' method

[IMP] (*_)sale_*: adapt to the new optional products logic