simplified SMJ state management #823

Job	Run time
Check cargo fmt	39s
cargo check	11m 2s
build with wasm-pack	2m 43s
cargo test (macos)	7m 48s
cargo test (macos-aarch64)	10m 10s
Verify MSRV (Min Supported Rust Version)	7m 35s
Verify Vendored Code	53s
cargo test (win64)	51m 6s
Run sqllogictest with Postgres runner	3m 32s
cargo doc	3m 58s
clippy	2m 14s
cargo test (amd64)	10m 17s
cargo test datafusion-cli (amd64)	4m 8s
cargo test doc (amd64)	15m 15s
cargo examples (amd64)	14m 1s
cargo test pyarrow (amd64)	2m 50s
verify benchmark results (amd64)	12m 41s
check Cargo.toml formatting	3m 4s
check configs.md and ***_functions.md is up-to-date	3m 5s
cargo test hash collisions (amd64)	13m 47s
	3h 0m 48s

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