release-5.0 Forwarding logs to Kafka using Chained certificates fails with error "state=error: certificate verify failed (unable to get local issuer certificate)"

Previously, forwarding logs to Kafka using chained certificates failed with error "state=error: certificate verify failed (unable to get local issuer certificate)." Logs could not be forwarded to a Kafka broker with a certificate signed by an intermediate CA. This happened because fluentd Kafka plugin could only handle a single CA certificate supplied in the ca-bundle.crt entry of the corresponding secret. The current release fixes this issue. It enables the fluentd Kafka plugin to handle multiple CA certificates supplied in the ca-bundle.crt entry of the corresponding secret. Now, logs can be forwarded to a Kafka broker with a certificate signed by an intermediate CA.