[Bug][Connector-V2][File] Fix the bug of incorrect path in windows environment

[TyrantLucifer]

Purpose of this pull request

fix #2979

Check list

• Code changed are covered with tests, or it does not need tests for reason:
• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/incubator-seatunnel/tree/dev/docs

[ashulin]

Can UT be added?

[TyrantLucifer]

Can UT be added?

config file:

#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

env {
  # You can set spark configuration here
  spark.app.name = "SeaTunnel"
  spark.executor.instances = 1
  spark.executor.cores = 1
  spark.executor.memory = "1g"
  spark.master = local
  job.mode = "BATCH"
}

source {
  FakeSource {
    schema = {
      fields {
        c_map = "map<string, string>"
        c_array = "array<int>"
        c_string = string
        c_boolean = boolean
        c_tinyint = tinyint
        c_smallint = smallint
        c_int = int
        c_bigint = bigint
        c_float = float
        c_double = double
        c_bytes = bytes
        c_date = date
        c_decimal = "decimal(30, 8)"
        c_timestamp = timestamp
        c_row = {
          c_map = "map<string, string>"
          c_array = "array<int>"
          c_string = string
          c_boolean = boolean
          c_tinyint = tinyint
          c_smallint = smallint
          c_int = int
          c_bigint = bigint
          c_float = float
          c_double = double
          c_bytes = bytes
          c_date = date
          c_decimal = "decimal(30, 8)"
          c_timestamp = timestamp
        }
      }
    }
  }

  # If you would like to get more information about how to configure seatunnel and see full list of source plugins,
  # please go to https://seatunnel.apache.org/docs/flink/configuration/source-plugins/Fake
}

transform {

  # If you would like to get more information about how to configure seatunnel and see full list of transform plugins,
  # please go to https://seatunnel.apache.org/docs/flink/configuration/transform-plugins/Sql
}

sink {
  LocalFile {
    path="\\tmp\\seatunnel\\dist\\text"
    tmp_path = "\\temp\\seatunnel"
    row_delimiter="\n"
    partition_dir_expression="${k0}=${v0}"
    is_partition_field_write_in_file=true
    file_name_expression="${transactionId}_${now}"
    file_format="text"
    filename_time_format="yyyy.MM.dd"
    is_enable_transaction=true
  }

  # If you would like to get more information about how to configure seatunnel and see full list of sink plugins,
  # please go to https://seatunnel.apache.org/docs/connector-v2/sink/File
}

[EricJoy2048]

+1