[`flake8-comprehension`] Strip parentheses around generators in C400 #28859

Job	Run time
python package	1m 15s
mkdocs	2m 19s
cargo fmt	20s
Determine changes	8s
pre-commit	35s
cargo test (windows)	5m 37s
cargo test (linux)	3m 14s
cargo build (release)	4m 39s
cargo test (wasm)	1m 13s
cargo clippy	1m 31s
benchmarks	4m 6s
cargo fuzz	3m 59s
cargo shear	23s
formatter instabilities and black similarity	0s
test scripts	59s
test ruff-lsp	20s
ecosystem	9m 13s
Fuzz the parser	0s
	39m 51s

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