[7.17] [ML] Include an extra header in CDataFrameRowSlice #2565
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Our two ARM macOS build servers have somehow ended up running different versions of Xcode - one is running version 12 and the other version 13.
There have been changes to the C++ standard library between these versions that reveal a technical violation that we were previously getting away with: CDataFrameRowSlice.cc uses file streams without including the necessary header. Previously it must have been indirectly included. This PR includes it explicitly.
Backport of #2563