[client-v2] Fixes BinaryStreamReader parsing DateTime64 values. Using a column defined scale now.

[chernser]

Summary

Added more tests for DateTime values and made it be read with column defined scale.

Closes: #1851

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

[sonarqubecloud]

Quality Gate failed

Failed conditions
40.0% Coverage on New Code (required ≥ 80%)
E Maintainability Rating on New Code (required ≥ A)

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