[promptflow][Test] Skip known enum issue in test when Python 3.11 (#1040

)

# Description

Skip test `test_ensure_node_inputs_type` in Python 3.11 due to known
enum issue.

# All Promptflow Contribution checklist:
- [x] **The pull request does not introduce [breaking changes].**
- [ ] **CHANGELOG is updated for new features, bug fixes or other
significant changes.**
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- [ ] **Create an issue and link to the pull request to get dedicated
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## General Guidelines and Best Practices
- [x] Title of the pull request is clear and informative.
- [x] There are a small number of commits, each of which have an
informative message. This means that previously merged commits do not
appear in the history of the PR. For more information on cleaning up the
commits in your PR, [see this
page](https://github.com/Azure/azure-powershell/blob/master/documentation/development-docs/cleaning-up-commits.md).

### Testing Guidelines
- [x] Pull request includes test coverage for the included changes.

---------

Co-authored-by: Hhhilulu <[email protected]>

src/promptflow/tests/executor/unittests/executor/test_tool_resolver.py

@@ -153,6 +153,10 @@ def test_resolve_tool_by_node_with_duplicated_inputs(self, resolver, mocker):
         assert isinstance(exec_info.value.inner_exception, NodeInputValidationError)
         assert "These inputs are duplicated" in exec_info.value.message
 
+    @pytest.mark.skipif(
+        condition=(sys.version_info.major == 3 and sys.version_info.minor == 11),
+        reason="BUG 2709800: known issue on enum in Python 3.11",
+    )
     def test_ensure_node_inputs_type(self):
         # Case 1: conn_name not in connections, should raise conn_name not found error
         tool = Tool(name="mock", type="python", inputs={"conn": InputDefinition(type=["CustomConnection"])})