[QA Refactor] Use JSON to publish content pages

• Type: Testing
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 7.4.3.6 CE GA6, 7.4.13 DXP U2, Master
• Component/s: Pages > Page Editor
• Labels: None
• Epic Link: 7.4 CE GA2 Echo Testing tasks

Context
After the code implemented in this PR now we have the ability to publish content pages via JSON. For that a new method called JSONLayout.publishLayout has been implemented.

What to do
We need to identify when it makes sense to publish content pages via JSON. Maybe we can sear for "JSONLayout.addPublicLayout" in code and see if pages are published after that or search "PageEditor.clickPublish();" and check if it makes sense to change it for the new JSONLayout.publishLayout(

DoD
We replaced all content page detected into JSON calls