[Hotfix][Connector-V2] Fixed precision problem of decimal data types for paimon sink

[dailai]

Purpose of this pull request

Fix the problem that the data type precision of decimal at the sink side is greater than the precision at the source side, the data is written incorrectly. Like this: The filed in source is decimal(4,1), the value of temp in source is 36.3 The filed in sinnk is decimal(16,6) which the table is created manually And then the result is not correct, the value of temp in sink is 0.000363

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.