Fix OSS build failures

Summary:
Changes for OSS thrift-python compatibility:

`sink.pyx`: Cython requires `noexcept` on callback functions. Adds it to `sink_final_resp_callback`.

`adapter.py`: GitHub CI runs in UTC while `DatetimeAdapter.from_thrift` uses local timezone. Changes test assertion to use `datetime.fromtimestamp()` for timezone-agnostic comparison.

Reviewed By: prakashgayasen

Differential Revision: D90645108

fbshipit-source-id: cdf2595d20c1019d5b4efd1d388331e9dc7bdb29

Author: Satish Kumar

third-party/thrift/src/thrift/lib/python/streaming/sink.pyx

@@ -134,7 +134,7 @@ cdef raise_first_exception_field(response_struct):
 cdef void sink_final_resp_callback(
     cFollyTry[unique_ptr[cIOBuf]]&& res,
     PyObject* user_data,
-):
+) noexcept:
     future, final_resp_cls, sink_elem_cls, protocol = <object> user_data
 
     try:

third-party/thrift/src/thrift/lib/python/test/adapter.py

@@ -263,7 +263,7 @@ def test_directly_annotated(self) -> None:
         self.assertIsInstance(foo.baz.value, self._fbthrift_unadapted_Baz)
 
     def test_adapted_variable(self) -> None:
-        self.assertEqual(self.NINETEEN_EIGHTY_FOUR, datetime(1984, 1, 1))
+        self.assertEqual(self.NINETEEN_EIGHTY_FOUR, datetime.fromtimestamp(441792000))
         self.assertEqual(self._fbthrift_unadapted_NINETEEN_EIGHTY_FOUR, 441792000)
 
     def test_adapted_field_with_default_value(self) -> None: