Use pyrefly lsp to find definition for attributes

Summary: In this diff I am using the function `find_definition_for_base_type` to get the attribute definition. This allow getting the file where the attribute was defined and result more accurate results.

Reviewed By: donsbot

Differential Revision: D92757977

fbshipit-source-id: 9a720e3ac6ec807626affa62726694996ecbc2e0

Author: rubmary

glean/lang/python-pyrefly/tests/regression/without_dynamic_import/declaration_uses/simple/declaration_uses.out

@@ -11,6 +11,17 @@
       "span": { "length": 3, "start": 314 }
     }
   },
+  {
+    "key": {
+      "declaration": {
+        "cls": { "key": { "name": { "key": "mod_b.util.Cls" } } }
+      },
+      "file": {
+        "key": "glean/lang/python-pyrefly/tests/regression/without_dynamic_import/declaration_uses/simple/mod_a/__init__.py"
+      },
+      "span": { "length": 3, "start": 392 }
+    }
+  },
   {
     "key": {
       "declaration": {

glean/lang/python-pyrefly/tests/regression/without_dynamic_import/declaration_uses/simple/xrefs_via_name_by_file.out

@@ -18,6 +18,10 @@
           "source": { "length": 3, "start": 392 },
           "target": { "key": "mod_b.helper.Cls" }
         },
+        {
+          "source": { "length": 3, "start": 392 },
+          "target": { "key": "mod_b.util.Cls" }
+        },
         {
           "source": { "length": 3, "start": 400 },
           "target": { "key": "mod_a.Cls" }