Repacment API for capabilities such as `list_has_content_length` etc.

[killme2008]

@Xuanwo @yihong0618 GreptimeDB used list_has_content_length to determine whether to call stat again:

https://github.com/GreptimeTeam/greptimedb/blob/d774996e89648dbdf25326cc8440b51847095abb/src/object-store/src/layers/lru_cache/read_cache.rs#L163

Since it’s been removed, is there a replacement API?

Looks like it's always true, so maybe I can just remove this checking.

Thank you.

Originally posted by @killme2008 in #6313 (comment)