Rust

refactor: `SchemaProvider::table` can fail #131

Job	Run time
Check cargo fmt	42s
cargo check	7m 52s
build with wasm-pack	2m 9s
cargo test (macos)	21m 57s
cargo test (macos-aarch64)	10m 12s
cargo test (win64)	45m 23s
Verify MSRV (Min Supported Rust Version)	7m 13s
Verify Vendored Code	1m 2s
cargo test pyarrow (amd64)	2m 30s
check Cargo.toml formatting	3m 18s
cargo doc	4m 37s
clippy	5m 28s
cargo test hash collisions (amd64)	9m 34s
cargo test (amd64)	9m 40s
cargo test datafusion-cli (amd64)	3m 43s
cargo test doc (amd64)	12m 6s
cargo examples (amd64)	8m 48s
Run sqllogictest with Postgres runner	2m 59s
verify benchmark results (amd64)	10m 43s
check configs.md is up-to-date	2m 35s
	2h 52m 31s

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