MGMT-24875: Backport #10527 disconnected ZTP/CAPI fixes

[andrej1991]

Backport functional fixes from #10527:

• OSImageStream source discovery and registries.conf mirror entries
• Hypershift CLI podman --authfile for disconnected CAPI installs
• ZTP install success checks and wait helper reliability
• Treat empty image env vars as unset

List all the issues related to this PR

• New Feature
• Enhancement
• Bug fix
• Tests
• Documentation
• CI/CD

What environments does this code impact?

• Automation (CI, tools, etc)
• Cloud
• Operator Managed Deployments
• None

How was this code tested?

• assisted-test-infra environment
• dev-scripts environment
• Reviewer's test appreciated
• Waiting for CI to do a full test run
• Manual (Elaborate on how it was tested)
• No tests needed

Checklist

• Title and description added to both, commit and PR.
• Relevant issues have been associated (see CONTRIBUTING guide)
• This change does not require a documentation update (docstring, docs, README, etc)
• Does this change include unit-tests (note that code changes require unit-tests)

Reviewers Checklist

• Are the title and description (in both PR and commit) meaningful and clear?
• Is there a bug required (and linked) for this change?
• Should this PR be backported?

[openshift-ci-robot]

@andrej1991: This pull request references MGMT-24875 which is a valid jira issue.

Details

In response to this:

Backport functional fixes from #10527:

• OSImageStream source discovery and registries.conf mirror entries
• Hypershift CLI podman --authfile for disconnected CAPI installs
• ZTP install success checks and wait helper reliability
• Treat empty image env vars as unset

List all the issues related to this PR

• New Feature
• Enhancement
• Bug fix
• Tests
• Documentation
• CI/CD

What environments does this code impact?

• Automation (CI, tools, etc)
• Cloud
• Operator Managed Deployments
• None

How was this code tested?

• assisted-test-infra environment
• dev-scripts environment
• Reviewer's test appreciated
• Waiting for CI to do a full test run
• Manual (Elaborate on how it was tested)
• No tests needed

Checklist

• Title and description added to both, commit and PR.
• Relevant issues have been associated (see CONTRIBUTING guide)
• This change does not require a documentation update (docstring, docs, README, etc)
• Does this change include unit-tests (note that code changes require unit-tests)

Reviewers Checklist

• Are the title and description (in both PR and commit) meaningful and clear?
• Is there a bug required (and linked) for this change?
• Should this PR be backported?

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: andrej1991
Once this PR has been reviewed and has the lgtm label, please assign adriengentil for approval. For more information see the Code Review Process.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.64%. Comparing base (af6eb11) to head (e864c80).

Additional details and impacted files

@@                Coverage Diff                @@
##           release-ocm-2.15   #10702   +/-   ##
=================================================
  Coverage             43.63%   43.64%           
=================================================
  Files                   408      408           
  Lines                 70640    70640           
=================================================
+ Hits                  30827    30832    +5     
+ Misses                37031    37028    -3     
+ Partials               2782     2780    -2     

Files with missing lines	Coverage Δ
internal/controller/controllers/images.go	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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[openshift-ci]

@andrej1991: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/mce-images	e864c80	link	true	/test mce-images
ci/prow/ci-index	e864c80	link	true	/test ci-index
ci/prow/images	e864c80	link	true	/test images
ci/prow/e2e-ai-operator-ztp-disconnected	e864c80	link	true	/test e2e-ai-operator-ztp-disconnected
ci/prow/e2e-ai-operator-ztp	e864c80	link	true	/test e2e-ai-operator-ztp
ci/prow/e2e-ai-operator-disconnected-capi	e864c80	link	true	/test e2e-ai-operator-disconnected-capi
ci/prow/verify-generated-code	e864c80	link	true	/test verify-generated-code

Full PR test history. Your PR dashboard.

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