- for non-String argument
- for NUL-contained argument
- for ASCII-incompatible argument

There are two different possible messages: unsupported OS/version, and
unsupported filesystem on a supported system.

Fixup 4c26a38ed3c

https://rubyci.s3.amazonaws.com/amazon2/ruby-master/log/20250601T213003Z.fail.html.gz

```
1)
An exception occurred during: Mock.verify_count
File.birthtime accepts an object that has a #to_path method FAILED
Mock 'path' expected to receive to_path(:any_args) exactly 1 times
but received it 0 times
/home/chkbuild/chkbuild/tmp/build/20250601T213003Z/ruby/spec/ruby/core/file/birthtime_spec.rb:4:in 'block in <top (required)>'
/home/chkbuild/chkbuild/tmp/build/20250601T213003Z/ruby/spec/ruby/core/file/birthtime_spec.rb:3:in '<top (required)>'
```

`statx(2)` is available since Linux 4.11 and glibc 2.28.