add sparse float vector support to different milvus components,
including proxy, data node to receive and write sparse float vectors to
binlog, query node to handle search requests, index node to build index
for sparse float column, etc.
https://github.com/milvus-io/milvus/issues/29419
---------
Signed-off-by: Buqian Zheng <zhengbuqian@gmail.com>
issue: #28960 [milvus-proto
#212](https://github.com/milvus-io/milvus-proto/issues/212)
add new configuration: builtinRoles
user can define roles in config file: `milvus.yaml`
there is an example:
1. db_ro, only have read privileges, include load
2. db_rw, read and write privileges, include create/drop/rename
collection
3. db_admin, not only read and write privileges, but also user
administration
Signed-off-by: PowderLi <min.li@zilliz.com>
