Apply azure_max_single_part_copy_size setting for normal copy operations

Why it matters

This feature ensures consistent application of the azure_max_single_part_copy_size setting across both backup and normal copy operations to Azure storage. It solves the inconsistency problem, allowing users to better control the maximum size of a single part copy, improving performance and reliability.

How to use it

Users can configure the azure_max_single_part_copy_size setting in their ClickHouse configuration or session settings. This setting will now be respected during all Azure copy operations, not just backups.