[FW][MIG] website_sale_search_improved: Migration to 13.0

[fw-bot-adhoc]

Forward-Port-Of: ingadhoc/website#170

[roboadhoc]

Pull request status dashboard.

[fw-bot-adhoc]

@jjscarafia this PR targets 16.0 and is the last of the forward-port chain containing:

• ingadhoc/website#242

To merge the full chain, say

@fw-bot-adhoc r+

More info at https://github.com/odoo/odoo/wiki/Mergebot#forward-port

[jjscarafia]

@fw-bot-adhoc r+