Detect named expressions in decorators before Python 3.9 #41232

Job	Run time
cargo build (release)	0s
mkdocs	2m 23s
cargo fmt	21s
Determine changes	10s
pre-commit	3m 15s
python package	1m 24s
benchmarks	4m 16s
cargo clippy	1m 50s
cargo build (msrv)	2m 15s
cargo fuzz build	4m 1s
cargo shear	23s
cargo test (linux)	2m 2s
cargo test (linux, release)	4m 3s
cargo test (wasm)	1m 40s
cargo test (windows)	4m 51s
formatter instabilities and black similarity	3m 18s
test scripts	1m 8s
ecosystem	4m 0s
test ruff-lsp	39s
fuzz parser	5m 52s
	47m 51s

Provide feedback