Rename ExperienceSelector action variables to be consistent

• Type: Task
• Status: Selected for Development
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: None
• Fix Version/s: None
• Component/s: Content Page Experience Personalization
• Labels:
  • tango_frontend

See this comment here where the proposal: https://github.com/liferay-tango/liferay-portal/pull/769#discussion_r560832399

onDeleteExperience={deleteExperience}
onDuplicateExperience={handleExperienceDuplication}
onEditExperience={handleEditExperienceClick}
onPriorityDecrease={decreasePriority}
onPriorityIncrease={increasePriority}