feat: Add `stringview` support to `encode` and `decode` and `bit_length` #34947

Job	Run time
Check License Header	2m 16s
Check cargo fmt	52s
build with wasm-pack	2m 50s
cargo check	8m 46s
cargo test (macos)	16m 37s
cargo test (macos-aarch64)	14m 38s
Verify Vendored Code	49s
cargo test (win64)	1h 16m 23s
Verify MSRV (Min Supported Rust Version)	8m 59s
cargo test doc (amd64)	16m 13s
cargo test (amd64)	12m 9s
cargo doc	5m 18s
cargo test datafusion-cli (amd64)	4m 26s
cargo examples (amd64)	14m 6s
verify benchmark results (amd64)	14m 2s
check Cargo.toml formatting	3m 1s
clippy	6m 12s
check configs.md and ***_functions.md is up-to-date	3m 14s
cargo test hash collisions (amd64)	17m 24s
Run sqllogictest with Postgres runner	3m 47s
cargo test pyarrow (amd64)	2m 56s
	3h 54m 58s

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