test(remote_wal): add sqlness with kafka wal (#3027)

* feat(sqlness): add kafka wal config

* chore: add sqlness with kafka wal ci config

* fix: fix config

* chore: apply suggestions from CR

* fix: add metasrv config to sqlness with kafka

* fix: replay memtable should from flushed_entry_id + 1

* fix: should set append flag to fopen

* feat: start wal allocator in standalone meta mode

* feat: append a noop record after kafka topic initialization

* test: ignore tests temporally

* test: change sqlness kafka wal config

src/common/meta/src/wal/kafka.rs

@@ -27,6 +27,7 @@ pub use crate::wal::kafka::topic_manager::TopicManager;
 
 /// Configurations for kafka wal.
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+#[serde(default)]
 pub struct KafkaConfig {
     /// The broker endpoints of the Kafka cluster.
     pub broker_endpoints: Vec<String>,