Add CI with -Z randomize-layout

[xFrednet]

Almost all communication between the linter driver and lint-crates requires the exchange of information. For rust-marker, this is done with marker_api types. Special care needs to be taken, since Rust doesn't have a stable ABI. To ensure that this is done correctly, I would like to see a CI step that uses the -Z randomize-layout flag.

It should be checked, that the -Z randomize-layout is also passed on by cargo-marker which compiles the driver and lint crates

---

I imagine something like running this on linux (Since those are the fastest GH runners), and start the test suite two or three times with random layouts. Just running it once might not catch all invalid instances. When we have more tests, the test suite can be reduced to a small subset. It will most likely also be enough if this is run as part of bors tests, just to not waste GH runner time more than needed.