Patched async function not registering calls until coroutine is awaited

Bug report

Bug description:

When using autospec=True the patched async function only has calls registered after the coroutine is awaited. This behavior started happening after I upgraded from 3.12 to 3.13.6.

Code to reproduce

File tests/other_module.py

async def a(value):
    return value * 2

File tests/test_1.py

from unittest.mock import patch

import pytest

import other_module

pytestmark = pytest.mark.asyncio(loop_scope="session")

def b(value):
    return other_module.a(value)


async def test_1():
    with patch.object(other_module, "a", side_effect=other_module.a, autospec=True) as a_mock:
        result = b(10)

        assert not a_mock.called  # This should be True because 'a' was called, but it's False

        await result
        assert a_mock.called  # Now it's True

CPython versions tested on:

3.13

Operating systems tested on:

Linux

使用 tests/other_module.py 和 tests/test_1.py 重現該行為，重點關注帶有 side_effect 和 autospec=True 的 patch.object。檢查 mock 相對於 coroutine 建立和 await 的時機何時記錄呼叫。完成的標準是：第一個 assertion 在 await 之前通過，且該行為由適當的 CPython 測試涵蓋。