PY-48219 Use PyModuleType to get attributes of a not imported module

It gives more accurate results and allows to bypass the problem
of PyFile#iterateNames(), which limits the results by the content
of "__all__" (as the method is used to resolve names in star imports).

GitOrigin-RevId: b19604d9e25a738909a02a1d81e4716675417430

python/testData/completion/notImportedQualifiedName/AliasAttributesNotLimitedByDunderAll/main.after.py

@@ -0,0 +1,3 @@
+import numpy as np
+
+np.arange()

python/testData/completion/notImportedQualifiedName/AliasAttributesNotLimitedByDunderAll/main.py

@@ -0,0 +1 @@
+np.a<caret>

python/testData/completion/notImportedQualifiedName/AliasAttributesNotLimitedByDunderAll/numpy/__init__.py

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+def max():
+    pass
+
+
+def arange():
+    pass
+
+
+__all__ = ['max']

python/testData/completion/notImportedQualifiedName/AttributesNotLimitedByDunderAll/main.py

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+mod.<caret>

python/testData/completion/notImportedQualifiedName/AttributesNotLimitedByDunderAll/mod.py

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+foo = 1
+bar = 2
+__all__ = ['bar']