Only set signal handlers if outside of a context manager:

- Since context managers can handle signals appropriately, disconnecting
  after receiving a signal, only set signal handlers if outside of a
  context manager instantiation
  i.e. ``await AsyncWeb3(PersistentConnectionProvider(...))``.

web3/main.py

@@ -540,7 +540,10 @@ def socket(self) -> PersistentConnection:
     )
     def __await__(self) -> Generator[Any, None, Self]:
         async def __async_init__() -> Self:
-            await self.provider.connect()
+            provider = cast("PersistentConnectionProvider", self.provider)
+            await provider.connect()
+            # set signal handlers since not within a context manager
+            provider._set_signal_handlers()
             return self
 
         return __async_init__().__await__()

web3/providers/persistent/persistent.py

@@ -177,7 +177,6 @@ async def connect(self) -> None:
                 self.logger.info(
                     f"Successfully connected to: {self.get_endpoint_uri_or_ipc_path()}"
                 )
-                self._set_signal_handlers()
                 break
             except (WebSocketException, OSError) as e:
                 if _connection_attempts == self._max_connection_retries: