Rust

Make the test not flaky #589

Job	Run time
cargo check	2m 2s
cargo test (mac)	11m 43s
build with wasm-pack	1m 45s
cargo test (win64)	28m 16s
Check cargo fmt	36s
Verify MSRV	6m 4s
Verify Vendored Code	43s
cargo test (amd64)	8m 51s
Run sqllogictest with Postgres runner	3m 16s
cargo doc	3m 12s
clippy	2m 27s
cargo test datafusion-cli (amd64)	2m 49s
cargo test doc (amd64)	9m 56s
cargo examples (amd64)	6m 26s
cargo test pyarrow (amd64)	2m 19s
verify benchmark results (amd64)	9m 38s
check Cargo.toml formatting	1m 10s
check configs.md is up-to-date	2m 13s
cargo test hash collisions (amd64)	8m 19s
	1h 51m 45s

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