add proccess label to base.config

Co-authored-by: Nico Trummer <nictru32@gmail.com>

nf_core/pipeline-template/conf/base.config

@@ -59,4 +59,7 @@ process {
         errorStrategy = 'retry'
         maxRetries    = 2
     }
+    withLabel: process_gpu {
+        ext.use_gpu = {workflow.profile.contains('gpu')}
+    }
 }