exports for wasi_snapshot_preview1::fd_write in memory64 has 32 bit pointers

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### Test Case

Wasm file uploaded

### Steps to Reproduce

Run with `wasmtime --wasm-features memory64`

### Expected Results

It runs

### Actual Results

Fails with

```
Error: failed to run main module `C:\Users\ScottWaye\OneDrive\wasm64\1.wasm`

Caused by:
0: failed to instantiate "C:\\Users\\ScottWaye\\OneDrive\\wasm64\\1.wasm"
1: incompatible import type for `wasi_snapshot_preview1::fd_write`
2: function types incompatible: expected func of type `(i32, i64, i64, i64) -> (i32)`, found func of type `(i32, i32, i32, i32) -> (i32)`
```

### Versions and Environment

Wasmtime version or commit: wasmtime 0.31.0

Operating system: Win10

Architecture: x64?

### Extra Info

Looks like the wasi export is using 32 bit pointers when for memory64 shouldn't it be 64 bit?

Anything else you'd like to add?
[1.zip](https://github.com/bytecodealliance/wasmtime/files/7686227/1.zip)