Fix regression from GH-8587 (#8615)

* Fix regression from GH-8587

Streams hold a reference to the stream wrapper. User stream wrappers
must not be released until the streams the

Fix regression from GH-8587 (#8615)

* Fix regression from GH-8587

Streams hold a reference to the stream wrapper. User stream wrappers
must not be released until the streams themselves are closed.

* Add test for directories

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Fix stream_wrapper_unregister() resource leak

Closes GH-8548
Closes GH-8587