[TASK] Refactor fluid-based page module record preview

Creates a dedicated partial template which only contains
the preview output, allowing global overrides of preview
output without overriding the entire Record.html template.

Releases: master
Resolves: #90946
Change-Id: Ic3d9f9801476725bd37472f0266dfe0b69e8d653
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64072


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benni Mack <benni@typo3.org>

typo3/sysext/backend/Resources/Private/Partials/PageLayout/Record.html

@@ -7,9 +7,7 @@
         <div class="t3-page-ce-body">
             <div class="t3-page-ce-body-inner">
                 <div class="{f:if(condition: item.versioned, then: 'ver-element')}">
-                    <f:render partial="PageLayout/Record/{item.record.CType}/Preview" arguments="{_all}" optional="1">
-                        {item.preview -> f:format.raw()}
-                    </f:render>
+                    <f:render partial="PageLayout/Record/Preview" arguments="{_all}" />
                 </div>
             </div>
             <f:render partial="PageLayout/Record/{item.record.CType}/Footer" optional="1">

typo3/sysext/backend/Resources/Private/Partials/PageLayout/Record/Preview.html

+<f:render partial="PageLayout/Record/{item.record.CType}/Preview" arguments="{_all}" optional="1">
+    {item.preview -> f:format.raw()}
+</f:render>