Runtime discovery service breaks delta ADS

[alecholmez]

When using ADS with the incremental protocol, defining a RTDS layer in the bootstrap config breaks envoy and causes it to shutdown. Attached are some logs from the integration tests where we saw this failure

envoy.delta-ads.log

[github-actions]

This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in the next 7 days unless it is tagged "help wanted" or "no stalebot" or other activity occurs. Thank you for your contributions.

[github-actions]

This issue has been automatically closed because it has not had activity in the last 37 days. If this issue is still valid, please ping a maintainer and ask them to label it as "help wanted" or "no stalebot". Thank you for your contributions.