Add miri checks against IO IPC to mitigate RUSTSEC-2020-0159

[jorgecarleitao]

I went through the code in arrow-format and this crate and could not find any incorrect usage. However, given the size of this exposure, I propose that we do not ignore this advisory until we have MIRI running against the IPC implementation.

The goal of this issue is to make MIRI run against the IO IPC, to safeguard us against RUSTSEC-2020-0159.

The blocker/challenge is that MIRI in isolation does not allow opening a file, and we do need to open IPC files to roundtrip them. We should try to lift the isolation constraint on the CI for MIRI to have it run against IPC roundtrip tests (tests::io::ipc::file::write should be sufficient).