Auto merge of #115699 - RalfJung:interpret-abi-compat, r=oli-obk

interpret: change ABI-compat test to be type-based

This makes the test consistent across targets. Otherwise the chances are very high that ABI mismatches get accepted on x86_64 but still fail on many other targets with more complicated ABIs.

This implements (most of) the rules described in https://github.com/rust-lang/rust/pull/115476.