GDScript: Fix common mismatched external parser errors

modules/gdscript/tests/scripts/analyzer/features/external_parser.gd

@@ -0,0 +1,17 @@
+extends "external_parser_base1.notest.gd"
+
+const External1 = preload("external_parser_script1.notest.gd")
+
+func baz(e1: External1) -> void:
+	print(e1.e1c.bar)
+	print(e1.baz)
+
+func test_external_base_parser_type_resolve(_v: TypeFromBase):
+	pass
+
+func test():
+	var ext := External1.new()
+	print(ext.array[0].test2)
+	print(ext.get_external2().get_external3().test3)
+	# TODO: This actually produces a runtime error, but we're testing the analyzer here
+	#baz(ext)