chore: add library type to .repo-metadata.json (#71)

Author: parthea

packages/google-analytics-data/.repo-metadata.json

@@ -6,6 +6,7 @@
   "issue_tracker": "https://issuetracker.google.com/issues?q=componentid:187400%2B%20",
   "release_level": "beta",
   "language": "python",
+  "library_type": "GAPIC_AUTO",
   "repo": "googleapis/python-analytics-data",
   "distribution_name": "google-analytics-data",
   "api_id": "analyticsdata.googleapis.com",