Wasmtime can panic when adding excessive fields to a `wasi:http/types.fields` instance

{
                    "vendor": "bytecodealliance",
                    "product": "wasmtime",
                    "versions": [
                        {
                            "version": "< 24.0.6",
                            "status": "affected"
                        },
                        {
                            "version": ">= 25.0.0, < 36.0.6",
                            "status": "affected"
                        },
                        {
                            "version": ">= 37.0.0, < 40.0.4",
                            "status": "affected"
                        },
                        {
                            "version": ">= 41.0.0, < 41.0.4",
                            "status": "affected"
                        }
                    ]
                }