Fix green-20220302 import without websocket helpers

[AndersonBY]

Summary

• delay websocket helper imports in green-20220302 so importing the package and non-websocket APIs does not fail when alibabacloud-tea-openapi lacks websocketUtils modules
• keep MultiModalGuardWs websocket helper loading at the call/from_map site where it is actually needed
• add a regression test covering package import with the current alibabacloud-tea-openapi dependency

Reproduction

With alibabacloud-green20220302 3.4.0 and alibabacloud-tea-openapi 0.4.4, this currently fails during import:

from alibabacloud_green20220302 import models
from alibabacloud_green20220302.client import Client

The failure is caused by generated MultiModalGuardWs code importing alibabacloud_tea_openapi.websocketUtils_models and alibabacloud_tea_openapi.websocketUtils at module import time. Those modules are not present in the currently released alibabacloud-tea-openapi 0.4.4 package.

This PR does not claim MultiModalGuardWs works without the websocket helper support. It only avoids breaking unrelated APIs such as TextModeration at import time.

Test

• cd green-20220302 && /tmp/green-20220302-pr-venv/bin/python -m pytest tests/test_import.py -q
• cd green-20220302 && /tmp/green-20220302-pr-venv/bin/python -m compileall -q alibabacloud_green20220302
• git diff --check

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