Single simulation test on standard reconstruction

This is how we run all single particle productions. Some bugs apparently only affect these simulations. Hopefully this allows us to catch them.

benchmarks/single/config.yml

+single:process:
+  extends: .phy_benchmark
+  timeout: 24 hours
+  stage: process
+  script:
+    - bash benchmarks/single/single.sh e-_1GeV_45to135deg