Drawer - automatically manage focus when drawer is opened/closed

Follow up for core issue https://github.com/patternfly/patternfly/issues/5319
A more consistent solution than was used to fix https://github.com/patternfly/patternfly-react/issues/8394

move the close button to the top of the drawer body rather than the end.

The modal component automatically places focus on the first interactable element in the modal when it is opened.
In the case of the Drawer, that should be the close button by default.
If the close button is not provided, then it should be the first interactable element in the drawer.
If there are no interactable elements, focus should be placed on the drawer body.

Like the modal, this should happen automatically for the drawer, unless overridden by the consumer.

When the drawer is closed, focus should be returned to the drawer toggle - or at least, the props needed for the consumer to implement this focus management should be exposed. All related examples/demos should be updated to use this behavior (including the wizard with drawer)

Jira Issue: PF-145

首先将 Drawer 的焦点行为与现有的 Modal 行为进行比较，并查看 Drawer 示例，包括使用 drawer 的 wizard。实现所述的打开和关闭焦点行为，并支持 consumer 覆盖，然后更新所有相关示例和演示。完成标准是：焦点会根据情况到达关闭按钮、第一个可交互元素或 drawer 主体，并在关闭时返回 drawer toggle。