[red-knot] Correct modeling of dunder calls #41175

Job	Run time
cargo build (release)	0s
Determine changes	13s
cargo fmt	22s
mkdocs	2m 29s
pre-commit	3m 22s
python package	1m 22s
benchmarks	4m 31s
cargo clippy	1m 53s
cargo build (msrv)	2m 10s
cargo fuzz build	4m 7s
cargo shear	21s
cargo test (linux)	2m 3s
cargo test (wasm)	1m 36s
cargo test (linux, release)	4m 16s
cargo test (windows)	6m 34s
test scripts	1m 3s
formatter instabilities and black similarity	0s
ecosystem	19s
test ruff-lsp	41s
fuzz parser	0s
	37m 22s

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