[IMP] theme_*: extract shapes to configurator-dedicated templates

This commit extracts the pre-defined section shapes from blocks into
templates that are dedicated to being used by the configurator.

For blocks that are not used in configurator pages, the configurator
templates have not been created.

task-3381714

Part-of: odoo/design-themes#692

theme_notes/views/snippets/s_cover.xml

@@ -2,7 +2,14 @@
 <odoo>
 
 <template id="s_cover" inherit_id="website.s_cover">
-    <!-- Section -->
+    <!-- Title -->
+    <xpath expr="//h1" position="replace" mode="inner">
+        <b>Discover <br/>the Miraillet Festival</b>
+    </xpath>
+</template>
+
+<template id="configurator_s_cover" inherit_id="website.configurator_s_cover">
+    <!-- Shape option -->
     <xpath expr="//section" position="attributes">
         <attribute name="data-oe-shape-data">{"shape":"web_editor/Floats/12","flip":[]}</attribute>
     </xpath>
@@ -10,10 +17,6 @@
     <xpath expr="//div[hasclass('container')]" position="before">
         <div class="o_we_shape o_web_editor_Floats_12"/>
     </xpath>
-    <!-- Title -->
-    <xpath expr="//h1" position="replace" mode="inner">
-        <b>Discover <br/>the Miraillet Festival</b>
-    </xpath>
 </template>
 
 </odoo>