Allow separate debug mode configuration for workers vs flow runs #20652
Description
Current Behavior
Setting PREFECT_DEBUG_MODE on workers causes all flow runs executed by those workers to also log at debug level.
Desired Behavior
Provide a way to enable debug mode for workers independently from flow runs, so workers can run in debug mode without forcing debug logging on all flows they execute.
Workaround
Currently, setting PREFECT_DEBUG_MODE=false in the work pool's environment variables overrides the worker setting and prevents flow runs from inheriting debug mode. However, this requires manual configuration and isn't intuitive.