[storage] Fix Kafka TLS configuration with plaintext authentication

This change fixes the Kafka TLS configuration to work correctly when using
plaintext authentication with TLS enabled. Previously, TLS would only be
configured when authentication=tls, breaking SASL-SSL with PLAIN authentication.

Changes:
- Modified TLS configuration logic to support TLS with other authentication methods
- Fixed SASL-SSL with PLAIN authentication scenario
- Maintained backward compatibility with existing authentication methods
- Restored pre-PR-6270 behavior for TLS configuration

Resolves jaegertracing#6744

Signed-off-by: Amol Verma <[email protected]>

Author: Amol Verma

pkg/kafka/auth/tls.go

@@ -20,9 +20,5 @@ func setTLSConfiguration(config *configtls.ClientConfig, saramaConfig *sarama.Co
 
     saramaConfig.Net.TLS.Enable = true
     saramaConfig.Net.TLS.Config = tlsConfig
-    logger.Info("TLS configuration enabled for Kafka client", 
-        zap.Bool("skip_verify", config.InsecureSkipVerify),
-        zap.String("ca_file", config.CAFile),
-        zap.Bool("system_ca_enabled", config.Config.IncludeSystemCACertsPool))
     return nil
 }