Refresh the materialized_view table only if --full-refresh is speci…

[the4thamigo-uk]

…fied

Summary

Checklist

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• 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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[the4thamigo-uk]

#288