Add config to unconditionally prefer core imports over std

Fixes https://github.com/rust-lang/rust-analyzer/issues/12979

crates/hir-ty/src/display.rs

@@ -533,6 +533,7 @@ impl HirDisplay for Ty {
                             f.db.upcast(),
                             ItemInNs::Types((*def_id).into()),
                             module_id,
+                            false,
                         ) {
                             write!(f, "{}", path)?;
                         } else {