Convert ApproxPercentileCont and ApproxPercentileContWithWeight to UDAF #27938

Job	Run time
cargo test (macos)	6m 21s
cargo test (win64)	28m 21s
Check cargo fmt	42s
cargo check	4m 9s
build with wasm-pack	2m 17s
cargo test (macos-aarch64)	6m 30s
Verify MSRV (Min Supported Rust Version)	7m 5s
Verify Vendored Code	55s
cargo test (amd64)	9m 13s
cargo examples (amd64)	11m 43s
cargo test hash collisions (amd64)	8m 59s
clippy	5m 13s
cargo doc	3m 34s
cargo test datafusion-cli (amd64)	3m 41s
cargo test doc (amd64)	12m 46s
Run sqllogictest with Postgres runner	3m 32s
cargo test pyarrow (amd64)	2m 43s
verify benchmark results (amd64)	10m 30s
check Cargo.toml formatting	2m 51s
check configs.md is up-to-date	2m 31s
	2h 13m 36s

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