[java-storage] Support StripPrefix on upload for TransferManager

Currently transfer manager supports stripping a customer supplied prefix on an object on object download, the same functionality is not supported on upload and the name of the object maintains the full File name as the object name.

Start by reading the TransferManager upload and download paths and locating the existing download behavior for stripping a customer-supplied prefix. Trace how the object name is derived during upload, then make the upload behavior match the requested prefix handling and verify that the stored object name omits the supplied file-name prefix.

由索引模型根据 Issue 内容生成。