Avoid false-positives for parens-on-raise with `future.exception()` #25279

Job	Run time
cargo fmt	14s
Determine changes	18s
pre-commit	51s
python package	1m 26s
mkdocs	2m 23s
cargo test (linux)	3m 59s
cargo test (wasm)	1m 20s
cargo clippy	2m 2s
cargo test (windows)	5m 46s
cargo fuzz	5m 12s
cargo udeps	1m 52s
test scripts	56s
benchmarks	4m 45s
formatter instabilities and black similarity	0s
ecosystem	8m 11s
test ruff-lsp	16s
	39m 31s

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