These two were added in 28e23d7f348c78d49a726c7469f9d4e38edec341
and 3558c1f2e97455e0b89edef31b9a72ab7fa30550 for version 0.9.0 of
SVT-AV1, which is also our minimum requirement right now.

In other words, no additional version limiting conditions seem
to be required.

Additionally, add a FATE test which verifies that pass-through of
the MDCV/CLL side data is working during encoding.