refactor(bf): hold the Google Ads id/label in the page, keep ads-consent.js generic

Tag id + conversion label now live as data-ads-id / data-ads-send-to on the banner
element, so the served HTML carries the tag config and the script stays reusable
(missing config -> inert). Re-verified: no cookie/request before consent, cookies +
tag after Accept, conversion + form submit on click, 700 ms fallback submit with the
tag blocked.

odoo-black-friday/index.html

@@ -1070,6 +1070,8 @@
       class="ads-consent"
       role="region"
       aria-label="Advertising cookie consent"
+      data-ads-id="AW-18065522009"
+      data-ads-send-to="AW-18065522009/vnDUCPDxt7AdENn6p6ZD"
       hidden
     >
       <div class="ads-consent-inner">