[minor]: Introduce IndexSet and IndexMap aliases. #35496

Job	Run time
Check cargo fmt	36s
Check License Header	2m 24s
cargo check	12m 35s
build with wasm-pack	3m 5s
cargo test (macos)	12m 8s
cargo test (macos-aarch64)	12m 39s
Verify Vendored Code	54s
Verify MSRV (Min Supported Rust Version)	9m 27s
cargo test (win64)	1h 10m 58s
cargo examples (amd64)	14m 27s
cargo test datafusion-cli (amd64)	4m 34s
clippy	7m 13s
check Cargo.toml formatting	3m 7s
check configs.md and ***_functions.md is up-to-date	3m 39s
cargo test hash collisions (amd64)	28m 22s
cargo doc	4m 40s
cargo test (amd64)	11m 46s
cargo test doc (amd64)	17m 36s
cargo test pyarrow (amd64)	2m 58s
Run sqllogictest with Postgres runner	4m 35s
verify benchmark results (amd64)	14m 52s
	4h 2m 35s

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