chore: Add macos executor for unit tests (#1334)

### Description

- Run unit tests in CI also on `MacOS` to prevent OS-specific
incompatible changes, for example:
#1329
- Add time tolerance for the `test_emit_system_info_event` to minimize
flakiness of the test.

Author: Pijukatel

.github/workflows/run_code_checks.yaml

@@ -36,6 +36,7 @@ jobs:
       httpbin_url: ${{ secrets.APIFY_HTTPBIN_TOKEN && format('https://httpbin.apify.actor?token={0}', secrets.APIFY_HTTPBIN_TOKEN) || 'https://httpbin.org'}}
     with:
       python-versions: '["3.10", "3.11", "3.12", "3.13", "3.14"]'
+      os: '["ubuntu-latest", "windows-latest", "macos-latest"]'
 
   docs_check:
     name: Docs check

tests/unit/events/test_local_event_manager.py

@@ -2,30 +2,24 @@
 
 import asyncio
 from datetime import timedelta
-from functools import update_wrapper
 from typing import Any
 from unittest.mock import AsyncMock
 
-import pytest
-
 from crawlee.events import LocalEventManager
 from crawlee.events._types import Event, EventSystemInfoData
 
 
-@pytest.fixture
-def listener() -> AsyncMock:
-    async def async_listener(payload: Any) -> None:
-        pass
-
-    al = AsyncMock()
-    update_wrapper(al, async_listener)
-    return al
+async def test_emit_system_info_event() -> None:
+    mocked_listener = AsyncMock()
 
+    async def async_listener(payload: Any) -> None:
+        mocked_listener(payload)
 
-async def test_emit_system_info_event(listener: AsyncMock) -> None:
-    async with LocalEventManager(system_info_interval=timedelta(milliseconds=50)) as event_manager:
-        event_manager.on(event=Event.SYSTEM_INFO, listener=listener)
-        await asyncio.sleep(0.2)
+    system_info_interval = timedelta(milliseconds=50)
+    test_tolerance_coefficient = 10
+    async with LocalEventManager(system_info_interval=system_info_interval) as event_manager:
+        event_manager.on(event=Event.SYSTEM_INFO, listener=async_listener)
+        await asyncio.sleep(system_info_interval.total_seconds() * test_tolerance_coefficient)
 
-    assert listener.call_count >= 1
-    assert isinstance(listener.call_args[0][0], EventSystemInfoData)
+    assert mocked_listener.call_count >= 1
+    assert isinstance(mocked_listener.call_args[0][0], EventSystemInfoData)