Consider irrefutable pattern similar to `if .. else` for `C901` #28746

Job	Run time
pre-commit	28s
cargo fmt	17s
mkdocs	2m 7s
Determine changes	11s
python package	1m 10s
benchmarks	4m 5s
cargo build (release)	4m 58s
cargo fuzz	4m 13s
cargo clippy	1m 38s
cargo shear	30s
cargo test (linux)	3m 13s
cargo test (wasm)	1m 12s
cargo test (windows)	6m 56s
formatter instabilities and black similarity	4m 7s
test scripts	58s
Fuzz the parser	5m 34s
test ruff-lsp	21s
ecosystem	14m 47s
	56m 45s

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