chore: disable analytics-data warnings as errors (#16881)

Similar to #16716 disable warnings as errors for this one API to unblock
generation.

Author: noahdietz

.librarian/generator-input/client-post-processing/allow-docs-warnings.yaml

@@ -17,6 +17,12 @@ url: https://github.com/googleapis/gapic-generator-python/issues/2490
 # is annoying, but that's what synthtool expects and it's not worth fixing that
 # at this stage.
 replacements:
+  - paths: [
+      packages/google-analytics-data/noxfile.py,
+    ]
+    before: '        "-W",  # warnings as errors\n'
+    after: ''
+    count: 1
   - paths: [
       packages/google-cloud-compute/noxfile.py,
     ]