XWIKI-22738: Target syntax is not set on the transformation context when the document content is rendered

[mflorea]

Jira URL

https://jira.xwiki.org/browse/XWIKI-22738

Changes

Description

• Set the target syntax on the transformation context, when displaying the document content, based on the display parameters
• Fix the URL used by the WYSIWYG editor to convert the HTML

Clarifications

• I'm worried by the fact that I had to update the HTML Converter URL to remove the outputSyntax=plain. This parameter is used in lots of places in conjunction with the get action, so I'm worried there might be other regressions...

Executed Tests

None

Expected merging strategy

• Prefers squash: Yes