Use draft entity in the edit mode for layout page template entries

• Type: Technical Task
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: Master
• Component/s: Pages > Page Editor
• Labels: None
• Sprint: WE | Sprint 14 | Mar18 - Mar31, WE | Sprint 15 | Apr1 - Apr5
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/70266

Use draft entity in the edit mode for layout page template entries with the ability to publish changes and discard draft.