Refactor PrimitiveGroupValueBuilder to use `MaybeNullBufferBuilder` #32819

Job	Run time
Check cargo fmt	41s
cargo check	8m 35s
build with wasm-pack	2m 36s
cargo test (macos)	9m 52s
cargo test (macos-aarch64)	11m 49s
Verify Vendored Code	48s
Verify MSRV (Min Supported Rust Version)	7m 12s
cargo test (win64)	54m 58s
cargo test datafusion-cli (amd64)	4m 6s
clippy	5m 49s
check configs.md is up-to-date	2m 52s
check Cargo.toml formatting	3m 0s
cargo test hash collisions (amd64)	14m 53s
cargo doc	4m 21s
cargo test (amd64)	10m 24s
cargo test doc (amd64)	15m 16s
cargo examples (amd64)	13m 45s
Run sqllogictest with Postgres runner	3m 33s
cargo test pyarrow (amd64)	2m 46s
verify benchmark results (amd64)	12m 47s
	3h 10m 3s

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