[BUG] fix slaveReconfEnabled disabled normal failover

[raffertyyu]

• slave-reconf-enabled will simultaneously affect the master failover and the slave node drift. master failover should always be allowed.

Description

Motivation and Context

How Has This Been Tested?

Types of Changes

• [ ] Bug fix (non-breaking change that fixes an issue)
• [ ] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• [ ] Code follows the code style of this project.
• [ ] Change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.