Strpos and contains performance improvements #37045

Job	Run time
Check cargo fmt	42s
linux build test	4m 46s
Check License Header	2m 20s
build with wasm-pack	3m 58s
cargo test (macos-aarch64)	13m 11s
Verify MSRV (Min Supported Rust Version)	9m 56s
Verify Vendored Code	50s
cargo check no default features	10m 9s
cargo check functions	2m 15s
cargo check datafusion	5m 35s
check Cargo.toml formatting	3m 52s
clippy	8m 49s
cargo doc	5m 56s
cargo test (amd64)	13m 44s
cargo test datafusion-cli (amd64)	6m 9s
cargo test doc (amd64)	20m 2s
cargo examples (amd64)	17m 4s
Run sqllogictest with Postgres runner	5m 57s
cargo test pyarrow (amd64)	4m 6s
verify benchmark results (amd64)	9m 49s
check configs.md and ***_functions.md is up-to-date	5m 7s
	2h 34m 17s

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