issue: #40532
- balance should enable only when there's no proxy and datanode which
version is lower than 2.6.0
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Signed-off-by: chyezh <chyezh@outlook.com>
issue: #40311
- better logging for grpc resolver
- remove the redundant streaming node manage client when streaming
service is disable
Signed-off-by: chyezh <chyezh@outlook.com>
issue: #33285
- add two grpc resolver (by session and by streaming coord assignment
service)
- add one grpc balancer (by serverID and roundrobin)
- add lazy conn to avoid block by first service discovery
- add some utility function for streaming service
Signed-off-by: chyezh <chyezh@outlook.com>