[Bug][Connector-V2][Hive] Fix init failure when Hive table/partition directory is empty

[yzeng1618]

Purpose of this pull request

Fix Hive Source initialization failures when the Hive table (or selected partitions) contains no readable data files (e.g. newly created empty table, empty partitions, or filters result in no files).

Before this pr:

• TEXT tables may fail during source initialization with:
  • java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
  • caused by file read strategy referencing fileNames.get(0) while fileNames is empty.
• ORC/PARQUET tables may build an empty (0-column) schema when no files exist, which can later fail Hive Sink initialization with:
  • java.lang.IllegalArgumentException
  • from FileSinkConfig precondition check (empty rowType).

Does this PR introduce any user-facing change?

Yes.

This pr adds a Hive Metastore (HMS) schema fallback when the table/partition location contains no data files:

• Build a stable non-empty schema from HMS (table columns + optional partition columns), so the job can start and process 0 rows gracefully.
• Keeps partition keys metadata in CatalogTable.

How was this patch tested?

1. Added unit test:

• HiveSourceConfigEmptyFilesTest

2. Added e2e coverage:

• Empty TEXT table read -> Assert (0 rows)
• Empty PARQUET table Hive -> Hive job init

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 necessary, please update incompatible-changes.md to describe the incompatibility caused by this PR.
• 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