Introduce shortcut labeling in "Find in Viewport" context menu item in the Outliner (#7095)

Signed-off-by: Danilo Aimini <82231674+AMZN-daimini@users.noreply.github.com>

Code/Framework/AzToolsFramework/AzToolsFramework/UI/Outliner/EntityOutlinerWidget.cpp

@@ -890,6 +890,7 @@ namespace AzToolsFramework
 
         m_actionGoToEntitiesInViewport = new QAction(tr("Find in viewport"), this);
         m_actionGoToEntitiesInViewport->setShortcutContext(Qt::WidgetWithChildrenShortcut);
+        m_actionGoToEntitiesInViewport->setShortcut(tr("Z"));
         connect(m_actionGoToEntitiesInViewport, &QAction::triggered, this, &EntityOutlinerWidget::GoToEntitiesInViewport);
         addAction(m_actionGoToEntitiesInViewport);
     }