[FIX] website: Make Qweb cache website dependent

Without this patch, all Qweb cache is shared among all available websites.
This turns impossible in practice to actually create multiple websites with
different look.

This closes odoo/odoo#18462

odoo/addons/base/ir/ir_qweb/ir_qweb.py

@@ -62,7 +62,7 @@ class IrQWeb(models.AbstractModel, QWeb):
     # assume cache will be invalidated by third party on write to ir.ui.view
     def _get_template_cache_keys(self):
         """ Return the list of context keys to use for caching ``_get_template``. """
-        return ['lang', 'inherit_branding', 'editable', 'translatable', 'edit_translations']
+        return ['lang', 'inherit_branding', 'editable', 'translatable', 'edit_translations', 'website_id']
 
     # apply ormcache_context decorator unless in dev mode...
     @tools.conditional(
@@ -186,14 +186,14 @@ class IrQWeb(models.AbstractModel, QWeb):
         # in non-xml-debug mode we want assets to be cached forever, and the admin can force a cache clear
         # by restarting the server after updating the source code (or using the "Clear server cache" in debug tools)
         'xml' not in tools.config['dev_mode'],
-        tools.ormcache('xmlid', 'options.get("lang", "en_US")', 'css', 'js', 'debug', 'async'),
+        tools.ormcache_context('xmlid', 'options.get("lang", "en_US")', 'css', 'js', 'debug', 'async', keys=("website_id",)),
     )
     def _get_asset(self, xmlid, options, css=True, js=True, debug=False, async=False, values=None):
         files, remains = self._get_asset_content(xmlid, options)
         asset = AssetsBundle(xmlid, files, remains, env=self.env)
         return asset.to_html(css=css, js=js, debug=debug, async=async, url_for=(values or {}).get('url_for', lambda url: url))
 
-    @tools.ormcache('xmlid', 'options.get("lang", "en_US")')
+    @tools.ormcache_context('xmlid', 'options.get("lang", "en_US")', keys=("website_id",))
     def _get_asset_content(self, xmlid, options):
         options = dict(options,
             inherit_branding=False, inherit_branding_auto=False,

odoo/addons/base/ir/ir_ui_view.py

@@ -912,7 +912,7 @@ actual arch.
 
     def _read_template_keys(self):
         """ Return the list of context keys to use for caching ``_read_template``. """
-        return ['lang', 'inherit_branding', 'editable', 'translatable', 'edit_translations']
+        return ['lang', 'inherit_branding', 'editable', 'translatable', 'edit_translations', 'website_id']
 
     # apply ormcache_context decorator unless in dev mode...
     @api.model