add the "prepare" method to the list of recognized dunder method #23594

Job	Run time
mkdocs	1m 55s
Determine changes	8s
pre-commit	36s
cargo fmt	13s
python package	1m 8s
benchmarks	6m 0s
cargo test (linux)	3m 45s
cargo fuzz	4m 11s
cargo clippy	1m 43s
cargo test (windows)	5m 18s
cargo udeps	1m 47s
cargo test (wasm)	1m 7s
formatter instabilities and black similarity	0s
test scripts	52s
ecosystem	8m 53s
test ruff-lsp	21s
	37m 57s

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