Add example of using `PruningPredicate` to datafusion-examples #23119

Job	Run time
build with wasm-pack	2m 18s
cargo test (macos)	22m 41s
cargo check	2m 41s
Check cargo fmt	40s
Verify MSRV (Min Supported Rust Version)	7m 0s
Verify Vendored Code	45s
cargo test (win64)	41m 17s
cargo test datafusion-cli (amd64)	3m 31s
cargo examples (amd64)	8m 22s
cargo test hash collisions (amd64)	8m 43s
clippy	5m 11s
cargo test (amd64)	9m 26s
cargo doc	3m 31s
cargo test doc (amd64)	11m 5s
Run sqllogictest with Postgres runner	3m 14s
cargo test pyarrow (amd64)	3m 17s
verify benchmark results (amd64)	9m 57s
check Cargo.toml formatting	1m 33s
check configs.md is up-to-date	2m 35s
	2h 27m 47s

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