Respect dictionary unpacking in `NamedTuple` assignments #21923

Job	Run time
cargo clippy	1m 49s
benchmarks	9m 36s
cargo fmt	15s
cargo test (linux)	3m 27s
cargo test (wasm)	1m 4s
cargo test (windows)	5m 7s
cargo fuzz	3m 37s
cargo udeps	1m 49s
Determine changes	10s
mkdocs	2m 4s
python package	1m 11s
test scripts	48s
pre-commit	23s
formatter instabilities and black similarity	0s
test ruff-lsp	15s
ecosystem	7m 43s
	39m 18s

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