Support disable leaderelection function and related parameters configuration

[FanZhang526]

Enhancement

Support disable leaderelection function and related parameters configuration.

Is your feature request related to a problem?/Why is this needed

In single-copy deployment, it is not need to enable the leaderelection function.
Related leaderelection parameters should be optimized based on the actual environment.

Describe the solution you'd like in detail

Describe alternatives you've considered

Additional context