Restore `DocBuilder::new()` to avoid breaking API change #36204

Job	Run time
Check cargo fmt	40s
Check License Header	2m 8s
cargo check	8m 16s
build with wasm-pack	3m 17s
cargo test (macos)	12m 33s
cargo test (macos-aarch64)	12m 31s
Verify Vendored Code	53s
Verify MSRV (Min Supported Rust Version)	9m 2s
cargo test datafusion-cli (amd64)	4m 47s
cargo test (amd64)	12m 16s
cargo examples (amd64)	16m 25s
cargo doc	5m 58s
verify benchmark results (amd64)	15m 40s
cargo test pyarrow (amd64)	3m 3s
Run sqllogictest with Postgres runner	4m 8s
check Cargo.toml formatting	2m 53s
check configs.md and ***_functions.md is up-to-date	3m 52s
clippy	7m 50s
cargo test hash collisions (amd64)	29m 35s
cargo test doc (amd64)	17m 25s
	2h 53m 12s

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