[test] Test Sizes of C API

[ppenna]

Context

As we do for our Rust API, we should test sizes for our C API.

This will help us to catch bugs that happen cross language boundaries.

Related Code

https://github.com/microsoft/demikernel/blob/ffaf885b178b675ad3cff83821485de3c960e31c/src/rust/runtime/types/ops.rs#L64-L113

https://github.com/microsoft/demikernel/blob/ffaf885b178b675ad3cff83821485de3c960e31c/src/rust/runtime/types/memory.rs#L52-L87