balance data job won't run if update storaged config and replicas at the same time

[MegaByte875]

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Describe the bug (required)

Your Environments (required)

• OS: uname -a
• Commit id (e.g. a3ffc7d8)

version 1.8.0
How To Reproduce(required)

Steps to reproduce the behavior:

1. create a nebula cluster with 3 storaged nodes, replica factor is 3
2. update storaged config static flag and replicas to 9 at the same time
3. storaged will do a rolling update
4. at last the storaged pods is 9 and nebula cluster status is ready, but balance data job not run

Expected behavior
nebula cluster status is ready and data is balanced

Additional context

[MegaByte875]

I can reproduce it, wil fix the issue in v1.8.1.

[MegaByte875]

#505