Use source type to determine parser mode for formatting #20692

Job	Run time
cargo fmt	20s
benchmarks	14m 36s
cargo fuzz	6m 18s
cargo clippy	2m 48s
cargo test \| ubuntu-latest	5m 29s
cargo test (wasm)	1m 47s
cargo udeps	2m 46s
Determine changes	15s
cargo test \| windows-latest	9m 17s
mkdocs	2m 55s
pre-commit	2m 9s
python package	2m 2s
test scripts	1m 5s
Formatter ecosystem and progress checks	6m 25s
ecosystem	5m 49s
test ruff-lsp	24s
	1h 4m 25s

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