fix(clickhouseexporter): respect TLS configuration when cert_file/key_file are missing and add test case (#43911)#44093

songy23 merged 9 commits into

open-telemetry:mainopen-telemetry/opentelemetry-collector-contrib:mainfrom

harshit-jindal02:fix-clickhouse-server-tlsharshit-jindal02/opentelemetry-collector-contrib:fix-clickhouse-server-tlsCopy head branch name to clipboard