Optimize local fs listing of transactions

[wjones127]

In #3882 we are making conflict resolution a little slower for local filesystems. This is because we are using ObjectStore's list to list all the manifests. That implementation will call stat on each entry, even if it's a file path we don't care about.

Instead we can use a similar strategy we have in:

https://github.com/lancedb/lance/blob/55c86f9b60774a4d36172430c1a9b033d9c5dba9/rust/lance-table/src/io/commit.rs#L333

1. Create an iterator of ManifestLocation just from the readdir results (will be missing e_tag and size).
2. Collect just the entries we care about
3. Then call stat of each of those in paralel to fill in e_tag and size.