with USER role can do balance data

[nebula-bots]

as title, however in doc， balance data only god can do

while --enable_authorize=true

balace leader also can do with user role

Describe the bug (required)

Your Environments (required)

nebula-ent-nightly, commit id : f1e5ec3

How To Reproduce(required)

Steps to reproduce the behavior:

1.  CREATE USER user1 WITH PASSWORD 'nebula';
2. grant role User on yx_test to user1
3. login in with user1;
4. do: balance data;

Expected behavior

report error ,only god role can do balance data