(0.49.x+) Fix Date/DateTime variables substitutions, add cluster setup for tests

[slvrtrn]

Summary

Resolves https://github.com/ClickHouse/metabase-clickhouse-driver/issues/216 Depends on https://github.com/metabase/metabase/pull/37813 (likely, 0.49.x).

Checklist

• [x] Unit and integration tests covering the common scenarios were added
• [x] A human-readable description of the changes was provided to include in CHANGELOG