[Chore]Remove ConnectorV1 from the dev branch (#3450)

* [Chore]Remove ConnectorV 1 from the dev branch
V1 has not been updated for a long time, and it has also tended to be stable.
As a development branch, we are currently focusing on V2-related development, so I will remove it from dev branch.

* fix deadlink

* revert some change

* remove V1 example

* remove flink v1 from dist

* update license

* update license

* update plugin-mapping.properties

* Revert "update plugin-mapping.properties"

This reverts commit d6e7b2f.

config/plugin_config

@@ -19,48 +19,6 @@
 #
 # corresponding to the module in the user Config, helping SeaTunnel to load the correct Jar package.
 # Don't modify the delimiter " -- ", just select the plugin you need
---flink-sql-connectors--
-flink-sql-connector-elasticsearch-6
-flink-sql-connector-elasticsearch-7
-flink-sql-connector-jdbc
-flink-sql-connector-kafka
---flink-connectors--
-seatunnel-connector-flink-assert
-seatunnel-connector-flink-druid
-seatunnel-connector-flink-fake
-seatunnel-connector-flink-file
-seatunnel-connector-flink-influxdb
-seatunnel-connector-flink-jdbc
-seatunnel-connector-flink-kafka
-seatunnel-connector-flink-socket
-seatunnel-connector-flink-http
-seatunnel-connector-flink-clickhouse
-seatunnel-connector-flink-console
-seatunnel-connector-flink-doris
-seatunnel-connector-flink-elasticsearch7
---spark-connectors--
-seatunnel-connector-spark-elasticsearch
-seatunnel-connector-spark-fake
-seatunnel-connector-spark-feishu
-seatunnel-connector-spark-file
-seatunnel-connector-spark-hbase
-seatunnel-connector-spark-hive
-seatunnel-connector-spark-http
-seatunnel-connector-spark-hudi
-seatunnel-connector-spark-iceberg
-seatunnel-connector-spark-jdbc
-seatunnel-connector-spark-kafka
-seatunnel-connector-spark-kudu
-seatunnel-connector-spark-mongodb
-seatunnel-connector-spark-neo4j
-seatunnel-connector-spark-phoenix
-seatunnel-connector-spark-redis
-seatunnel-connector-spark-socket
-seatunnel-connector-spark-tidb
-seatunnel-connector-spark-clickhouse
-seatunnel-connector-spark-console
-seatunnel-connector-spark-doris
-seatunnel-connector-spark-email
 --connectors-v2--
 connector-assert
 connector-kafka