Merge maps when combining options #29800

Job	Run time
pre-commit	34s
cargo fmt	16s
mkdocs	2m 42s
Determine changes	9s
python package	2m 16s
cargo build (release)	4m 47s
benchmarks	4m 34s
cargo build (msrv)	4m 11s
cargo clippy	2m 11s
cargo fuzz	4m 0s
cargo test (linux)	4m 4s
cargo shear	19s
cargo test (wasm)	1m 39s
cargo test (windows)	9m 35s
test scripts	1m 18s
formatter instabilities and black similarity	0s
test ruff-lsp	1m 24s
ecosystem	9m 43s
Fuzz the parser	0s
	53m 42s

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