Update y2020 configs with 5th pi + timestamp channels

Also, update the drivetrain_replay_test to go with it.

Change-Id: Ic88b2f79b14b260e345cfec4f3e5ce3e16a5bd2f
diff --git a/y2020/BUILD b/y2020/BUILD
index cd001a1..024b6ac 100644
--- a/y2020/BUILD
+++ b/y2020/BUILD
@@ -152,6 +152,7 @@
         ":config_pi2",
         ":config_pi3",
         ":config_pi4",
+        ":config_pi5",
         ":config_roborio",
     ],
     flatbuffers = [
@@ -191,6 +192,7 @@
         "pi2",
         "pi3",
         "pi4",
+        "pi5",
     ]
 ]
 
@@ -289,5 +291,5 @@
         parameters = {"NUM": str(num)},
         target_compatible_with = ["@platforms//os:linux"],
     )
-    for num in range(1, 5)
+    for num in range(1, 6)
 ]