Add completion handlers for operator hub

[mohammedzee1000]

/kind feature

Which functionality do you think we should add?

We should add support for completion handlers for operator hub based services

Why is this needed?

Service completion handlers are being removed as part of #4906 we should add them back, implementing them for operator hub services

[openshift-bot]

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Mark the issue as fresh by commenting /remove-lifecycle stale.
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/lifecycle stale

[valaparthvi]

/close
Not relevant atm.

[openshift-ci]

@valaparthvi: Closing this issue.

In response to this:

/close
Not relevant atm.

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