Auto merge of #117772 - surechen:for_117448, r=petrochenkov

Tracking import use types for more accurate redundant import checking

fixes #117448

By tracking import use types to check whether it is scope uses or the other situations like module-relative uses,  we can do more accurate redundant import checking.

For example unnecessary imports in std::prelude that can be eliminated:

```rust
use std::option::Option::Some;//~ WARNING the item `Some` is imported redundantly
use std::option::Option::None; //~ WARNING the item `None` is imported redundantly
```

crates/hir-def/src/body/pretty.rs

@@ -6,7 +6,7 @@ use itertools::Itertools;
 
 use crate::{
     hir::{
-        Array, BindingAnnotation, BindingId, CaptureBy, ClosureKind, Literal, LiteralOrConst,
+        Array, BindingAnnotation, CaptureBy, ClosureKind, Literal, LiteralOrConst,
         Movability, Statement,
     },
     pretty::{print_generic_args, print_path, print_type_ref},

crates/hir-def/src/import_map.rs

@@ -3,7 +3,7 @@
 use std::{fmt, hash::BuildHasherDefault};
 
 use base_db::CrateId;
-use fst::{self, raw::IndexedValue, Automaton, Streamer};
+use fst::{raw::IndexedValue, Automaton, Streamer};
 use hir_expand::name::Name;
 use indexmap::IndexMap;
 use itertools::Itertools;

crates/hir-def/src/item_tree/lower.rs

@@ -2,12 +2,12 @@
 
 use std::collections::hash_map::Entry;
 
-use hir_expand::{ast_id_map::AstIdMap, span_map::SpanMapRef, HirFileId};
-use syntax::ast::{self, HasModuleItem, HasTypeBounds, IsString};
+use hir_expand::{ast_id_map::AstIdMap, span_map::SpanMapRef};
+use syntax::ast::{HasModuleItem, HasTypeBounds, IsString};
 
 use crate::{
-    generics::{GenericParams, GenericParamsCollector, TypeParamData, TypeParamProvenance},
-    type_ref::{LifetimeRef, TraitBoundModifier, TraitRef},
+    generics::{GenericParamsCollector, TypeParamData, TypeParamProvenance},
+    type_ref::{LifetimeRef, TraitBoundModifier},
     LocalLifetimeParamId, LocalTypeOrConstParamId,
 };
 

crates/hir-def/src/item_tree/pretty.rs

@@ -1,13 +1,12 @@
 //! `ItemTree` debug printer.
 
-use std::fmt::{self, Write};
+use std::fmt::Write;
 
 use span::ErasedFileAstId;
 
 use crate::{
-    generics::{TypeOrConstParamData, WherePredicate, WherePredicateTypeTarget},
+    generics::{WherePredicate, WherePredicateTypeTarget},
     pretty::{print_path, print_type_bounds, print_type_ref},
-    visibility::RawVisibility,
 };
 
 use super::*;

crates/hir-def/src/nameres.rs

@@ -57,7 +57,7 @@ pub mod proc_macro;
 #[cfg(test)]
 mod tests;
 
-use std::{cmp::Ord, ops::Deref};
+use std::ops::Deref;
 
 use base_db::{CrateId, Edition, FileId};
 use hir_expand::{