Add housekeeper_skia.isolate

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2054883002

Review-Url: https://codereview.chromium.org/2054883002
diff --git a/infra/bots/housekeeper_skia.isolate b/infra/bots/housekeeper_skia.isolate
new file mode 100644
index 0000000..db0d579
--- /dev/null
+++ b/infra/bots/housekeeper_skia.isolate
@@ -0,0 +1,5 @@
+{
+  'includes': [
+    'skia_repo.isolate',
+  ],
+}