PY-38636 Fix go to declaration lead to pyi in some cases

(cherry picked from commit 33b52287f1d5241ee0bc4b8ff1c065e32f26d063)

IJ-MR-18958

GitOrigin-RevId: 5a59d6e6ea3ab001b8237d408340536abe2678e0

python/testData/navigation/classInPyiAssignedToFunctionInPy/source.py

@@ -0,0 +1,4 @@
+def foo():
+    return 42
+
+Clazz = foo()

python/testData/navigation/classInPyiAssignedToFunctionInPy/source.pyi

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+class Clazz:
+    def __init__(self) -> None: ...

python/testData/navigation/classInPyiAssignedToFunctionInPy/test.py

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+import source
+cl = source.Cl<caret>azz()

python/testData/navigation/classInPyiClassInPy/source.py

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+class Clazz:
+    def __init__(self) -> None:
+        pass

python/testData/navigation/classInPyiClassInPy/source.pyi

@@ -0,0 +1,2 @@
+class Clazz:
+    def __init__(self) -> None: ...

python/testData/navigation/classInPyiClassInPy/test.py

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+import source
+cl = source.Cl<caret>azz()

python/testData/navigation/importFile/addRoots/mypack/source.py

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+class Clazz:
+    def __init__(self) -> None:
+        pass

python/testData/navigation/importFile/mypack/source.pyi

@@ -0,0 +1,2 @@
+class Clazz:
+    def __init__(self) -> None: ...

python/testData/navigation/importFile/test.py

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+from mypack.sour<caret>ce import Clazz
+
+c = Clazz()