ci: try to enable drive access via gcloud

Author: chingor13

.kokoro/build.sh

@@ -41,6 +41,10 @@ then
   export PROJECT_ID=$(cat "${KOKORO_GFILE_DIR}/project-id.json")
 fi
 
+# try to enable Google Drive access
+gcloud --version
+gcloud auth login --enable-gdrive-access
+
 # If this is a continuous build, send the test log to the FlakyBot.
 # See https://github.com/googleapis/repo-automation-bots/tree/main/packages/flakybot.
 if [[ $KOKORO_BUILD_ARTIFACTS_SUBDIR = *"continuous"* ]]; then