ci: disable remote execution

Running the APE launcher on `aarch64` instances can fail with:

```
ape/toolchain/ape/ape-arm64-linux/ape-arm64-linux: 1: ape/toolchain/ape/ape-arm64-linux/ape-arm64-linux: Syntax error: "(" unexpected
```

This may be a `binfmt_misc` issue that is interpreting the binary incorrectly.

More investigation is needed.

For now, we will disable remote execution.