Avoid logging about missing cert keys if not adding a trust cert.
Review Request #15018 — Created April 16, 2026 and submitted — Latest diff uploaded
When building an SSL context, we were logging when a key for a client
cert couldn't be found when there wasn't even a client cert to begin
with. We now log this only when we know we have a cert but no key.
Hit this while testing another change and verified it was fixed.