[IMP] theme_avantgarde: adapt s_banner

Since the redesign of the original banner snippet, the customizations
made in theme_avantgarde have had to be adapted.

task-3097005

Part-of: odoo/design-themes#687

theme_avantgarde/views/customizations.xml

@@ -223,11 +223,4 @@
     </xpath>
 </template>
 
-<!-- ======== BANNER ======== -->
-<template id="s_banner" inherit_id="website.s_banner" name="Avantgarde s_banner">
-    <xpath expr="//a[hasclass('btn')]" position="attributes">
-        <attribute name="class" add="btn-lg" separator=" "/>
-    </xpath>
-</template>
-
 </odoo>

theme_avantgarde/views/images_library.xml

@@ -137,6 +137,16 @@ Check in images.scss, primary_variables.scss, main.scss and theme_common's mixin
     <field name="name">website.s_banner_default_image</field>
     <field name="url">/theme_avantgarde/static/src/img/pictures/bg_image_04.jpg</field>
 </record>
+<record id="s_banner_default_image_2" model="theme.ir.attachment">
+    <field name="key">website.s_banner_default_image_2</field>
+    <field name="name">website.s_banner_default_image_2</field>
+    <field name="url">/theme_avantgarde/static/src/img/pictures/bg_image_34.jpg</field>
+</record>
+<record id="s_banner_default_image_3" model="theme.ir.attachment">
+    <field name="key">website.s_banner_default_image_3</field>
+    <field name="name">website.s_banner_default_image_3</field>
+    <field name="url">/theme_avantgarde/static/src/img/pictures/bg_image_35.jpg</field>
+</record>
 <record id="s_popup_default_image" model="theme.ir.attachment">
     <field name="key">website.s_popup_default_image</field>
     <field name="name">website.s_popup_default_image</field>