Double type argument for to_timestamp function #20632

Job	Run time
cargo check	2m 32s
Check cargo fmt	37s
build with wasm-pack	1m 56s
cargo test (mac)	14m 43s
Verify MSRV	6m 17s
cargo test (win64)	27m 32s
Verify Vendored Code	48s
cargo test datafusion-cli (amd64)	2m 55s
cargo test doc (amd64)	9m 33s
clippy	4m 27s
cargo doc	3m 8s
cargo test hash collisions (amd64)	8m 18s
check Cargo.toml formatting	1m 16s
cargo test (amd64)	8m 44s
cargo examples (amd64)	6m 30s
Run sqllogictest with Postgres runner	3m 4s
cargo test pyarrow (amd64)	2m 5s
verify benchmark results (amd64)	9m 24s
check configs.md is up-to-date	2m 9s
	1h 55m 58s

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