Rust

Minor: Improve ObjectStoreUrl docs + examples #27115

Job	Run time
Check cargo fmt	28s
cargo check	7m 34s
build with wasm-pack	2m 19s
cargo test (macos)	8m 31s
cargo test (macos-aarch64)	10m 10s
Verify Vendored Code	41s
cargo test (win64)	32m 47s
Verify MSRV (Min Supported Rust Version)	6m 22s
cargo test (amd64)	9m 35s
cargo test datafusion-cli (amd64)	3m 32s
cargo examples (amd64)	11m 19s
check Cargo.toml formatting	2m 38s
clippy	4m 51s
check configs.md is up-to-date	2m 22s
cargo test hash collisions (amd64)	8m 44s
cargo doc	3m 37s
cargo test doc (amd64)	11m 40s
Run sqllogictest with Postgres runner	3m 11s
cargo test pyarrow (amd64)	2m 36s
verify benchmark results (amd64)	10m 44s
	2h 23m 41s

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