[lldb][test] TestCppTemplateArguments.py: adjust expected type

LLVM started emitting the `DW_AT_const_value` for floating point template parameters since #127045. Adjust the expected type in this test. It's still not quite correct but that requires a separate fix in LLDB.

Author: Michael137

lldb/test/API/lang/cpp/template-arguments/TestCppTemplateArguments.py

@@ -63,6 +63,8 @@ def test(self):
 
         # FIXME: type should be Foo<float, 2.0f>
         # FIXME: double/float NTTP parameter values currently not supported.
-        value = self.expect_expr("temp4", result_type="Foo<float, float>")
+        value = self.expect_expr("temp4", result_type="Foo<float, 1073741824>")
         template_param_value = value.GetType().GetTemplateArgumentValue(target, 1)
-        self.assertFalse(template_param_value)
+        self.assertEqual(template_param_value.GetTypeName(), "float")
+        # FIXME: this should return a float
+        self.assertEqual(template_param_value.GetValueAsSigned(), 2)