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Rollup merge of #138577 - aDotInTheVoid:deprecate-deprecations, r=GuillaumeGomez
rustdoc-json: Don't also include `#[deprecated]` in `Item::attrs`
Closes #138378
Not sure if this should bump `FORMAT_VERSION` or not. CC `@Enselic` `@LukeMathWalker` `@obi1kenobi`
r? `@GuillaumeGomez,` best reviewed commit-by-commit
