Odoo Release Updates

[IMP] product, *: simplify product variant management

[IMP] payment, website_sale: Improve payment flow

[FIX] website_sale: correct product canonical address in multilang

[IMP] website_sale: convert availability email view to mail.template

[REF] tests: enter registry test mode

[IMP] test_lint, *: Indexing of `Many2one` fields used in `related` fields

[REF] various: remove tracking_disable=False useless usage in tests

[REF] mail, various: remove useless 'tracking_disable'

[FIX] website, *: Reduce impact/resources of odoo tracker.

[FIX] website_sale_stock: limit number of combo product

[FIX] website_sale: use footer_templates_providers for footer option

[FIX] website_sale: consider leaves in delivery availabilities

[REM] web, website: remove useless zoomodoo.js

[FIX] website_sale: mail template issue with table on normalization

[FIX] website_sale: Filter categories by current website on product page

[IMP] product: add free_qty to stock without stock

[IMP] website_sale(_stock): move wishlist and stock notification

[IMP] website_sale(_stock): move logic

[IMP] website_sale(_stock): move eCom inventory fields and views

[IMP] website_sale(_stock): move ribbon logic to website_sale

[FIX] website_sale: fix website_sale.product_tags template

[FIX] website_sale: do not archive partner if comm. partner contacts have users

[FIX] website_sale: allow to skip billing address for services like event tickets

[FIX] website_sale: missed normalize_handlers into processors

[REF] *: run rendering context migration script on inline xml

[IMP] website_sale: automate suggested products

[FIX] payment_stripe, website_sale: handle avatax in express checkout

[IMP] website, *: js tracking

[REF] website,*: move request method from model

[IMP] website_sale_loyalty: add promotion progress bar on cart