Add QueryTimeMicroseconds Metrics to system.events

Why it matters

This feature provides more granular query timing metrics in microseconds, enabling users to better monitor and analyze the performance of queries, specifically select and insert operations, directly through the system.events system table.

How to use it

Users can query the system.events table to access the new timing metrics QueryTimeMicroseconds, SelectQueryTimeMicroseconds, and InsertQueryTimeMicroseconds to measure query execution times with microsecond precision. No additional configuration is required.