Clean up the whole of training-operator

[tenzen-y]

After merging kubeflow/common into this repo, we have many redundant and duplicated codes in this repo.
So, we should clean up the whole of this repo.

• Replace dummy client with fake client: Replace dummy client with fake client #1818
• Remove TestJobController: Refactoring tests in common/controller.v1 #1843
• Organizing utils: Clean up /pkg/common/util/v1 #1845
• Remove Reconciler: Removing reconciler code #1879
• Completely remove test_job:

/kind cleanup

ref: #1813

cc: @johnugeorge @andreyvelich

[tenzen-y]

I take Remove TestJobController.

[tenzen-y]

/reopen

[google-oss-prow]

@tenzen-y: Reopened this issue.

In response to this:

/reopen

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[johnugeorge]

As utils are cleaned up, Is there something pending in this issue?

[tenzen-y]

As utils are cleaned up, Is there something pending in this issue?

@johnugeorge I think we need to decide how we handle the reconciler because the reconciler is dead codes.

[zw0610]

As utils are cleaned up, Is there something pending in this issue?

@johnugeorge I think we need to decide how we handle the reconciler because the reconciler is dead codes.

I think we can just remove the reconciler part.