Add enforce_primary_key_uniqueness support to converter #507
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Summary
Records with same primary key/identify fields will be deduped with this PR, the purpose is that we can enforce primary key uniqueness as well as finding primary keys to be deleted based on equality delete files within same operation(No need to download into memory same files again). All records meant to be either deduped or deleted will be output in form of position deletes.
Rationale
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Changes
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Impact
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Testing
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Regression Risk
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Checklist
Unit tests covering the changes have been added
E2E testing has been performed
Additional Notes
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