fix(backend): fix the google-api-core to 1.16.0 for backend visualiza…

…tion server. (#4158)

* enable pagination when expanding experiment in both the home page and the archive page

* Revert "enable pagination when expanding experiment in both the home page and the archive page"

This reverts commit 5b67273.

* fix google api core to 1.16.0 until it gets newer release than 1.21.0

* add comments

backend/src/apiserver/visualization/requirements.txt

@@ -14,3 +14,5 @@ tensorflow-metadata==0.21.1
 tensorflow-model-analysis==0.21.5
 tensorflow-data-validation==0.21.1
 tornado==6.0.2
+# Increase google-api-core to some release AFTER 1.21.0 when it becomes available
+google-api-core==1.16.0