fix: handle validating table when `DropsPartitionFields` not present

[xushiyan]

Description

Some tables may not have hoodie.datasource.write.drop.partition.columns, the table validation should treat it as false by default.

How are the changes test-covered

• [ ] N/A
• [x] Automated tests (unit and/or integration tests)
• [ ] Manual tests
  • [ ] Details are described below

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.82%. Comparing base (c16f79a) to head (f17a079). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #142 +/- ## ========================================== + Coverage 87.79% 87.82% +0.03% ========================================== Files 14 14 Lines 729 731 +2 ========================================== + Hits 640 642 +2 Misses 89 89 ```

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