fix(format/js): fix arrow function type annotation inconsistency with prettier #2766
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Summary
This fixes a minor output mismatch with prettier related to arrow functions.
fixes #2736
Test Plan
Prettier has this condition when determining layout:
https://github.com/prettier/prettier/blob/fde0b49d7866e203ca748c306808a87b7c15548f/src/language-js/print/assignment.js#L145
I've added some snapshot tests based on the the playgrounds in #2736, but I'm not sure if I did it right.
cargo test -p biome_js_formatter