fix:Add health check probe to api-server, clustersynchro and controller

[ONE7live]

Signed-off-by: ONE7live [email protected]

What type of PR is this? /kind feature

What this PR does / why we need it: In practical applications, the component status should be checked before business initiation.

Which issue(s) this PR fixes: Fixes #334

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

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[ONE7live]

Provides a simple health checks method，what do you think? PTAL @Iceber @wuyingjun-lucky, thanks