Patches from poi

[antony-liu]

poi: #60520 - Provide *SSF functionality via Common SS
Remove test cases that have been removed in the POI
poi: assertEquals(false, ...) -> assertFalse(...)

[tonyqus]

Please list what's changed in the description

[antony-liu]

poi: #60520 - Provide *SSF functionality via Common SS

• 增加了三个接口：IChildAnchor , IShapeContainer 和ISimpleShape，在HSSF和XSSF UserModel中的对应接口、类或继承、或实现，通过接口提供一致的访问。
• HSSFShape实现IShape接口

remove test cases that have been removed in the POI

• 删除POI中已删除的测试用例

poi: assertEquals(false, ...) -> assertFalse(...)

• 把测试用例的断言 Assert.AreEqual(false, ...) 改为 Assert.IsFalse(...).
• 把测试用例的断言 Assert.AreEqual(true, ...) 改为 Assert.IsTrue(...).

[tonyqus]

LGTM