Rollup merge of #157872 - qaijuang:fix-suspicious-double-ref-op-type, r=camelid `suspicious_double_ref_op`: report unadjusted return type `suspicious_double_ref_op` uses the adjusted expression type to distinguish a no-op call from a double-reference operation. When the result is used as another method's receiver, that type can include the parent method's receiver adjustment. For example, `file.clone().write(&[])` reports that `clone` returns `&mut &File`, even though it returns `&File`. This PR continues to use the adjusted type for lint classification, but now uses the method call's unadjusted type in the diagnostic. The same issue affects `.deref()`, so the regression test covers both operations. Fixes rust-lang/rust#146227
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