* feat(core,schema,connectors): remove target,platform form connector schema and add id to metadata
* feat(schema,ui,console): unwrap ConnectorMetadata in ConnectorDTO
* feat(schema,ui,console): connector id use dashline instead of underscore
* feat(connector-alipay*): fix typos
* feat(connector-alipay*): remove unnecessary type declaration
* feat(core): update connector db schema
* feat(core): eliminate code redundancy for UTs
* feat(core): delete insertConnector on conflict logic and fix UTs
* feat(core): fix UI according to new connector type implementation
* feat(core): removed unused getConnectorByTargetAndPlatform methods
* feat(core): deprecate the function that updateConnector by giving target and platform
* feat(core): keep SSOT on combination of connector and corresponding metadata
* feat(core): rename index name in db
