Data inferral job can drop the content of macros that do not support xwiki syntax

[trrenty]

Describe the bug
When running the data inferral job from the admin section, if the page contains a macro that supports only plain text, it's content will be deleted.

Steps to reproduce
Steps to reproduce the problematic behavior:

0. You need to have installed the Pro Macro Confluence Bridges application (or use a different macro than confluence_tip that supports only plain text as its content.
1. Create a page containing the following content:

{{confluence_tip title="hello"}}
Content
{{/confluence_tip}}

{{task reference="/Tasks/Task_1" status="Done" }}
Test
{{/task}}

2. Go to the admin section and trigger the inferring job for the page
3. Go back to the page.

Expected behavior
The content of confluence_tip macro remains unchanged.

Actual behavior
The content of the confluence_tip macro is deleted.