[BUG] is_property_exist and is_cmd_connected apis cannot be called in async functions in Python Extension

[sunxilin]

Description

is_property_exist 和 is_cmd_connected 这两个api如果在非extension线程被调用会abort，需要修改他们的实现改成 ten_env.notify()

Environment

all

Steps to reproduce

在async on_start里调用is_property_exist

Expected behavior

能够正常同步返回结果

Actual behavior

assert导致进程abort退出

Version

0.3.0

Severity

Critical

Additional Information

No response