Update regular filename reference in autotune files (#3961)

We've generally decided that we'll be leaving files as eks-*.yaml - and
while there's some additional steps that need to be taken, those will
need to happen once we've gotten rid of all of the kubernetes-*.yaml
files.

As we still have some unmigrated operators, that means we still need to
wait. However, we can go ahead and update the comment in the autotune
files since those have recently caused some confusion (and assume that
anyone looking at autotune files is looking at them for non-operator
services)

paasta_tools/config_utils.py

@@ -70,7 +70,14 @@ def write_auto_config_data(
         if comment:
             content = (
                 yaml.round_trip_load(
-                    comment.format(regular_filename=f"{service}/{extra_info}.yaml")
+                    comment.format(
+                        # this is a bit of a hack, but we've decided to not rename files back to kubernetes-*
+                        # files. while we still need to update things to reference the eks files directly, there's
+                        # still a couple of places where we still need kubernetes-* files (e.g., unmigrated operators)
+                        # so for now let's just assume that autotuned things will always actually have their human-managed
+                        # config in eks-* files
+                        regular_filename=f"{service}/{extra_info.replace('kubernetes-', 'eks-')}.yaml",
+                    )
                 )
                 if comment
                 else {}