Attempting to append to a non-existant Parquet file throwing incorrect error

[joshmarshall1]

Found while testing #1229 and determined to be pre-existing.

When attempting to append to a non-existant file and error message of Cannot append a non-existent file, please save without mode='append' is expected. Instead, only for pdarrays being saved to parquet format, an error of Invalid argument: Argument type mismatch in argument 0 (in string.format) is being thrown.

To reproduce:

import arkouda as ak
ak.connect()
a = ak.arange(25)
#Will only error if there is no _LOCALE0000.parquet file in the directory
a.save_parquet("/home/josh/testing/", "1229_pdarray", "append")

This results in:

---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
Input In [4], in <cell line: 1>()
----> 1 a.save_parquet("/home/josh/testing/", "1229_pdarray", "append")

File ~/anaconda3/envs/test-env/lib/python3.8/site-packages/typeguard/__init__.py:1015, in typechecked.<locals>.wrapper(*args, **kwargs)
   1013 memo = _CallMemo(python_func, _localns, args=args, kwargs=kwargs)
   1014 check_argument_types(memo)
-> 1015 retval = func(*args, **kwargs)
   1016 try:
   1017     check_return_type(retval, memo)

File ~/git/arkouda/arkouda/pdarrayclass.py:1159, in pdarray.save_parquet(self, prefix_path, dataset, mode, compressed)
   1157 except Exception as e:
   1158     raise ValueError(e)
-> 1159 return cast(str, generic_msg(cmd="writeParquet", args="{} {} {} {} {} {}".\
   1160                              format(self.name, dataset, m, json_array, self.dtype,
   1161                                     compressed)))

File ~/git/arkouda/arkouda/client.py:548, in generic_msg(cmd, args, payload, send_binary, recv_binary)
    546     else:
    547         assert payload is None
--> 548         return _send_string_message(cmd=cmd, args=args, recv_binary=recv_binary)
    550 except KeyboardInterrupt as e:
    551     # if the user interrupts during command execution, the socket gets out
    552     # of sync reset the socket before raising the interrupt exception
    553     socket = context.socket(zmq.REQ)

File ~/git/arkouda/arkouda/client.py:351, in _send_string_message(cmd, recv_binary, args)
    349 # raise errors or warnings sent back from the server
    350 if return_message.msgType == MessageType.ERROR:
--> 351     raise RuntimeError(return_message.msg)
    352 elif return_message.msgType == MessageType.WARNING:
    353     warnings.warn(return_message.msg)

RuntimeError: Invalid argument: Argument type mismatch in argument 0 (in string.format)