Rust

Update INITCAP scalar function to support Utf8View #69

Job	Run time
cargo check	8m 48s
build with wasm-pack	2m 24s
cargo test (win64)	40m 22s
Check cargo fmt	46s
cargo test (macos)	10m 8s
cargo test (macos-aarch64)	9m 57s
Verify MSRV (Min Supported Rust Version)	6m 25s
Verify Vendored Code	51s
cargo test datafusion-cli (amd64)	3m 55s
cargo test doc (amd64)	13m 51s
check Cargo.toml formatting	3m 5s
clippy	5m 30s
cargo test hash collisions (amd64)	13m 38s
check configs.md is up-to-date	2m 48s
cargo doc	3m 24s
cargo test (amd64)	10m 43s
cargo examples (amd64)	13m 1s
Run sqllogictest with Postgres runner	3m 32s
cargo test pyarrow (amd64)	2m 54s
verify benchmark results (amd64)	12m 9s
	2h 48m 11s

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