[red-knot] Fix panic on cyclic `*` imports (#16958) #20

Job	Run time
cargo fmt	25s
Determine changes	13s
cargo build (release)	8m 4s
pre-commit	3m 53s
mkdocs	4m 48s
python package	2m 44s
cargo clippy	4m 5s
cargo test (linux)	1d 0h 0m 0s
cargo shear	24s
cargo test (linux, release)	1d 0h 0m 0s
cargo test (windows)	1s
cargo test (wasm)	2m 38s
test scripts	2m 29s
formatter instabilities and black similarity	5m 0s
cargo build (msrv)	1d 0h 0m 0s
cargo fuzz build	6m 33s
check playground	0s
benchmarks	0s
fuzz parser	0s
ecosystem	0s
test ruff-lsp	0s
	3d 0h 41m 17s

Provide feedback