Unnecessary logging of ClientConnectorError

[maciejka]

While waiting for transaction confirmation, plugin reports errors with stacktraces when connection to the sequencer fails:

StarknetPluginError: Got ClientConnectorError while trying to access https://alpha-mainnet.starknet.io/feeder_gateway/get_transaction_status?transactionHash=0x33db7d1e35ab71f85d9ae1c0f9966c2ab986d73d2b7498616f8d78230aac2fc.
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/aiohttp/connector.py", line 1154, in _create_direct_connection
...

connection is later retired:

Retrying transaction status check...

Unnecessary stacktraces make logs difficult to read.