Fix temporary table creation to support dbt unit tests

[ricardo-barreira]

Summary

Fixes #304

Checklist

Delete items not relevant to your PR:

• Unit and integration tests covering the common scenarios were added
• A human-readable description of the changes was provided to include in CHANGELOG
• For significant changes, documentation in https://github.com/ClickHouse/clickhouse-docs was updated with further explanations or tutorials

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[saraburns1]

Hey @BentsiLeviav - can you release a new version that includes this change? I'm trying to write unit tests with version 1.8 but they are failing.