[FIX] survey: properly inherit survey assets in website_survey module

Purpose
=======

Survey assets were incorrectly overridden in the website_survey module and all copy/pasted.

This will correctly include the survey_assets template and get rid of these copy/pasted
assets references, while keeping the website style on survey pages.

Task: #1915790
closes #29314

addons/website_survey/views/website_survey_templates.xml

@@ -1,24 +1,14 @@
 <?xml version='1.0' encoding='utf-8'?>
 <odoo>
-    <template id="survey_login_layout" inherit_id="survey.layout" name="Website Survey Login Layout">
+    <template id="website_survey_layout" inherit_id="survey.layout" name="Website Survey Layout">
         <xpath expr="t" position="replace">
             <t t-call="website.layout">
+                <t t-set="head">
+                    <t t-raw="head"/>
+                    <t t-call-assets="survey.survey_assets"/>
+                </t>
                 <t t-raw="0"/>
             </t>
         </xpath>
     </template>
-
-    <template id="assets_frontend" inherit_id="website.assets_frontend" name="Survey Assets">
-        <xpath expr="." position="inside">
-            <script src="/web/static/lib/nvd3/d3.v3.js"/>
-            <script src="/web/static/lib/nvd3/nv.d3.js"/>
-            <script type="text/javascript" src="/survey/static/src/js/survey_result.js"/>
-            <script type="text/javascript" src="/survey/static/src/js/survey.js"/>
-            <script type="text/javascript" src="/survey/static/src/js/tour_test_survey.js"/>
-            <script type="text/javascript" src="/web/static/src/js/fields/field_utils.js"/>
-            <link href="/survey/static/src/css/survey_print.css" rel="stylesheet" type="text/css"/>
-            <link href="/web/static/lib/nvd3/nv.d3.css" rel="stylesheet" type="text/css"/>
-            <link href="/survey/static/src/css/survey_result.css" rel="stylesheet" type="text/css"/>
-        </xpath>
-    </template>
 </odoo>