gazelle: use default proto generation except for testgrid/config
+# gazelle:proto legacy
+# Gazelle gets confused by the config.proto file here, since it is in the same directory
+# but a different package from main.go.
+# Also, we can't even use the default proto rules, since we apply nonstandard tags to the
+# generated code to support YAML.
+
package(default_visibility = ["//visibility:public"])
load(
