[Fix][Core] Fixed the problem that the configuration of two sources to one sink failed to pass the verification

[liugddx]

Purpose of this pull request

According to the design, this job can be executed, but it is now restricted by the submission.

#
# 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
#
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# 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
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#
######
###### This config file is a demonstration of streaming processing in SeaTunnel config
######

env {
  # You can set SeaTunnel environment configuration here
  parallelism = 2
  job.mode = "BATCH"
  checkpoint.interval = 10000
}

source {
  # This is a example source plugin **only for test and demonstrate the feature source plugin**
  FakeSource {
    parallelism = 2
    result_table_name = "fake"
    row.num = 16
    schema = {
      fields {
        name = "string"
        age = "int"
      }
    }
  }

  FakeSource {
    parallelism = 2
    result_table_name = "fake1"
    row.num = 16
    schema = {
      fields {
        name = "string"
        age = "int"
      }
    }
  }

  # 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/connector-v2/source
}

transform {
  Sql {
    source_table_name = "fake1"
    result_table_name = "sink_fake"
    query = "select * from fake"
  }
  Sql {
    source_table_name = "fake"
    result_table_name = "sink_fake"
    query = "select * from fake"
  }
}



sink {
  Console {
    source_table_name=sink_fake
  }

  # 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
}

Does this PR introduce any user-facing change?

How was this patch tested?

Check list

• 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/seatunnel/tree/dev/docs
• If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config
• Update the release-note.