This cmd engine rewrite part XXXIX.
It mainly finishes the pipe support by implementing the
rewrite of complex commands.
It also fixes a bunch of todo:s in the tests (linked to
some extraneous space handling for explicit blocks).
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https://gitlab.winehq.org/wine/wine/-/merge_requests/9199
H.264 uses a 16-pixel alignment, and the stream sink media type should
have the aligned height after the session has started.
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v13: mf/tests: Test H.264 decoder alignment.
mf/tests: Test H.264 sink media type height alignment.
https://gitlab.winehq.org/wine/wine/-/merge_requests/8887