[HTTP][API] Add backends info API for spark/flink connector (#6984)

Doris should provide a http api to return backends list for connectors to submit stream load,
and without privilege checking, which can let common user to use it
4 files changed
tree: a9cf75226bf6ce883daed483fc971a51bba1ecd2
  1. src/
  2. build.sh
  3. pom.xml