Deprecate initializer and registry-server

[cdjohnson]

Description of the change:
Per a discussion on the olm-dev triage call on Feb 4th, it was agreed that both the initializer and registry-server binaries should be deprecated in favor of opm equivalent commands.

Motivation for the change:
The registry-server is redundant and is no longer used in mainstream catalog index images, AFAIK.

The initializer approach doesn't use bundle images which is not strategic, which also requires the sqlite database to encode the entire CSV and Manifests and doesn't work well with the upcoming declarative index feature.

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /docs
• Commit messages sensible and descriptive

[openshift-ci-robot]

Hi @cdjohnson. Thanks for your PR.

I'm waiting for a operator-framework member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[codecov]

Codecov Report

Merging #587 (722db0e) into master (92a4c92) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #587   +/-   ##
=======================================
  Coverage   48.80%   48.80%           
=======================================
  Files          90       90           
  Lines        6276     6276           
=======================================
  Hits         3063     3063           
  Misses       2528     2528           
  Partials      685      685           

---

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[kevinrizza]

/ok-to-test
/approve

[openshift-ci]

@cdjohnson: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws	89dee1d	link	/test e2e-aws

Full PR test history. Your PR dashboard.

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[dinhxuanvu]

/test e2e-aws

[dinhxuanvu]

/lgtm

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cdjohnson, dinhxuanvu, kevinrizza

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