Use double quotes for all docstrings, including single-quoted docstrings #22434

Job	Run time
Determine changes	8s
python package	1m 16s
pre-commit	35s
cargo fmt	13s
mkdocs	2m 10s
cargo test (wasm)	1m 5s
benchmarks	9m 48s
cargo clippy	1m 45s
cargo test (linux)	3m 40s
cargo fuzz	4m 42s
cargo test (windows)	4m 19s
cargo udeps	1m 45s
formatter instabilities and black similarity	3m 47s
test scripts	47s
ecosystem	4m 49s
test ruff-lsp	20s
	41m 9s

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