feat: support Wasm core dumps on trap

We should support and emit Wasm core dumps on traps. Support for writing these already exists in the `Wasm-encoder` we currently use for tests: https://docs.rs/wasm-encoder/latest/wasm_encoder/struct.CoreDumpSection.html (and others). The full specification for the format is here. https://github.com/WebAssembly/tool-conventions/blob/main/Coredump.md