AsyncFileReaderNo Longer Object-Safe

[tustvold]

Describe the bug

#2115 added a get_byte_ranges method, however, this included a where bound on Self. This has the effect of making the trait not object-safe - https://github.com/apache/arrow-datafusion/runs/7728204421?check_suite_focus=true.

Technically this is just a warning, which can be suppressed at the crate-level (anything lower doesn't have any effect), but this is not an ideal solution.

To Reproduce

apache/arrow-datafusion#3051

Expected behavior

AsyncFileReader should be object-safe

Additional context