First usage example for CopyLogs re #10052

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Add CopyLogs usage example for merge strategy KeepExisting re #10052

Signed-off-by: Karl Palmen <karl.palmen@stfc.ac.uk>
Merge branch 'feature/10052_selected_algorithm_docs' into develop