chore: update lance dependency to v3.0.0-beta.5 (#3058)

## Summary
- Bump Lance Rust dependencies and Java `lance-core` to v3.0.0-beta.5
(refs/tags/v3.0.0-beta.5).
- Update workspace toolchain and dependency defaults needed for the new
Lance release.
- Resolve new clippy lint defaults introduced by the toolchain update.

## Validation
- `cargo clippy --workspace --tests --all-features -- -D warnings`
- `cargo fmt --all`

---------

Co-authored-by: Jack Ye <yezhaoqin@gmail.com>

python/Cargo.toml

@@ -7,7 +7,7 @@ license.workspace = true
 repository.workspace = true
 keywords.workspace = true
 categories.workspace = true
-rust-version = "1.88.0"
+rust-version = "1.91.0"
 
 [lib]
 name = "_lancedb"