Mention individual files copied during error artifact persistence

When copying logs and artifacts from failed builds, mention the full
target path instead of its parent. This reduces the number of actions
required to access the artifacts (select, paste, and enter).

easybuild/framework/easyblock.py

@@ -4436,8 +4436,8 @@ def create_persistence_paths(operation_args):
 
 def execute_and_log_persistence_operation(operation, source_paths, target_dir, msg, silent):
     for path in source_paths:
-        if os.path.exists(path):
-            operation(path, target_dir)
+        operation(path, target_dir)
+
     print_msg(msg, log=_log, silent=silent)
 
 
@@ -4470,12 +4470,13 @@ def persist_failed_compilation_log_and_artifacts(build_successful, application_l
                 silent=silent
             )
         else:
+            log_file_copies = [os.path.join(log_error_path, os.path.basename(log)) for log in logs]
             operation_args.append(
                 (
                     copy_file,
                     logs,
                     log_error_path,
-                    f"Logs of failed build copied to permanent storage: {log_error_path}"
+                    "Logs of failed build copied to permanent storage: " + ', '.join(log_file_copies)
                 )
             )