feat(index): add explicit adapter between `RangeReader` and `AsyncRead`

[zhongzc]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

#4717

What's changed and what's your intention?

• Add RangeReaderAdapter
• Simplify generic param on InvertedIndeFooterReader

Checklist

• [ ] I have written the necessary rustdoc comments.
• [ ] I have added the necessary unit tests and integration tests.
• [ ] This PR requires documentation updates.