Native completions for `cargo tree --target \t` does not include `all`

### Problem

We are missing the meta target `all` which is an important feature of `cargo tree` that can be easy to overlook.

### Steps

Setup https://doc.rust-lang.org/cargo/reference/unstable.html#native-completions

Run
```console
$ cargo tree --target \t
```

See platform tuples except `all`

### Possible Solution(s)

_No response_

### Notes

_No response_

### Version

```text

```