[ty] Avoid overcounting shared memory usage (#19773)

## Summary

Use a global tracker to avoid double counting `Arc` instances.

crates/ty_python_semantic/src/module_resolver/resolver.rs

@@ -61,7 +61,7 @@ impl ModuleResolveMode {
 ///
 /// This query should not be called directly. Instead, use [`resolve_module`]. It only exists
 /// because Salsa requires the module name to be an ingredient.
-#[salsa::tracked(heap_size=get_size2::heap_size)]
+#[salsa::tracked(heap_size=ruff_memory_usage::heap_size)]
 fn resolve_module_query<'db>(
     db: &'db dyn Db,
     module_name: ModuleNameIngredient<'db>,
@@ -118,7 +118,7 @@ pub(crate) fn path_to_module<'db>(db: &'db dyn Db, path: &FilePath) -> Option<Mo
 /// Resolves the module for the file with the given id.
 ///
 /// Returns `None` if the file is not a module locatable via any of the known search paths.
-#[salsa::tracked(heap_size=get_size2::heap_size)]
+#[salsa::tracked(heap_size=ruff_memory_usage::heap_size)]
 pub(crate) fn file_to_module(db: &dyn Db, file: File) -> Option<Module<'_>> {
     let _span = tracing::trace_span!("file_to_module", ?file).entered();
 
@@ -322,7 +322,7 @@ impl SearchPaths {
 /// The editable-install search paths for the first `site-packages` directory
 /// should come between the two `site-packages` directories when it comes to
 /// module-resolution priority.
-#[salsa::tracked(returns(deref), heap_size=get_size2::heap_size)]
+#[salsa::tracked(returns(deref), heap_size=ruff_memory_usage::heap_size)]
 pub(crate) fn dynamic_resolution_paths(db: &dyn Db) -> Vec<SearchPath> {
     tracing::debug!("Resolving dynamic module resolution paths");