fix: workaround certificate expiration issue in integration tests (#773)
fix: workaround certificate expiration issue in integration tests (#773)

Let's Encrypt CA certification expiration is causing integration tests to fail.
This commit works around this problem by removing the problematic certificate.

Context: https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/
googleapis/cloud-profiler-nodejs,googleapis/cloud-profiler-nodejs,googleapis/cloud-profiler-nodejs,googleapis/cloud-profiler-nodejs,googleapis/cloud-profiler-nodejs