v.22.2Improvement

Change Severity of "Cancelled Merging Parts" Log Message

Official CH changelog text
Change severity of the "Cancelled merging parts" message in logs, because it's not an error. This closes #34148. #34232 (alexey-milovidov).
Changed the log severity level of the "Cancelled merging parts" message to a less severe level since it is not an error.

Why it matters

This change improves log clarity by preventing misleading error messages for the "Cancelled merging parts" event, which is not an error but a normal operation. It helps users and administrators focus on genuine errors and reduces noise in logs.

How to use it

This update is applied automatically as part of the ClickHouse upgrade; no user action is required to enable this change.

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