[MTB] Implement Benchmark Lifecycle.

[phoenixking25]

Add a Pre-Run or Validate before Run for each Benchmark. Behavior of life-cycle would be like:

• validate or Pre-Run: if this returns an error the test is marked as "error" instead of "fail".
• Run: if this returns an error the test is marked as "fail", otherwise "pass".

No need of Post-run at the moment. @JimBugwadia

[phoenixking25]

/assign @Divya063

[k8s-ci-robot]

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/assign @Divya063

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[phoenixking25]

Merged #811