[Request]: container image load fails to read from file descriptor

### Feature or enhancement request details

https://github.com/bazel-contrib/rules_oci allow to specify a custom loader but `container` is unable to run it

loader:

```bash
#!/bin/bash

container image load --input "$3" # $3 /dev/fd/63
```

result:

```
Error: Error Domain=NSCocoaErrorDomain Code=512 "The file “63” couldn’t be saved in the folder “fd”." UserInfo={NSFilePath=/dev/fd/63, NSUnderlyingError=0x751840270 {Error Domain=NSPOSIXErrorDomain Code=9 "Bad file descriptor"}}
tar: Write error
```

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