[4.22] [Storage] Use source_dict for DataVolume source specification, refactor create_dv #5443

[jpeimer]

What this PR does / why we need it:

Manual cherry-pick: #5443

Additional change (not in original PR), needed to fix the pre-commit:

• Fix ruff E402 (module-level import not at top of file) lint errors across utilities/unittests/. The original PR introduced test_storage.py which had an E402 violation, and a ruff version bump exposed latent E402 violations in other unittest files by auto-removing stale # noqa: E402 comments.

• Fix: Centralize utilities.storage and utilities.ssp sys.modules mocking in utilities/unittests/conftest.py (alongside the existing mocks for utilities.hco, utilities.infra, utilities.virt). This removes redundant mocking from individual test files, allowing their imports to be at the top of each module. Also replaces deprecated IOError with OSError in test_data_collector.py.

Which issue(s) this PR fixes:

Special notes for reviewer:

jira-ticket:

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[jpeimer]

/build-and-push-container

[openshift-virtualization-qe-bot-4]

New container for quay.io/openshift-cnv/openshift-virtualization-tests:pr-5528 published

[jpeimer]

/verified

--jira -m 'tier2 and gating and (storage or virt or infrastructure or iuo)' --storage-class-matrix=ocs-storagecluster-ceph-rbd-virtualization --latest-rhel

openshift-virtualization-tests-runner/5876
one failure - test_cnv_deployment_priority_class_name - not related to the change

[openshift-virtualization-qe-bot-3]

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🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
set -euo pipefail
git fetch origin pull/5528/head:pr5528 2>&1 | tail -5
git checkout pr5528 2>&1 | tail -5
echo "---- Files changed ----"
git diff --name-only origin/main...pr5528 | tail -200
echo "---- create_dv related diff in utilities/storage.py ----"
git diff origin/main...pr5528 --unified=0 -- utilities/storage.py | grep -E '^[+-]def |^[+-]class ' || true
echo "---- conftest diff ----"
git diff origin/main...pr5528 -- utilities/unittests/conftest.py | head -100
echo "---- callers of create_dv ----"
rg -l 'create_dv' --type py | head -50

Length of output: 2578

---

@openshift-virtualization-qe-bot-3: I attempted to analyze the changed files in this PR to build the test execution plan, but the repository clone failed due to an authentication error (Invalid username or token), so I don't have access to the diff or codebase right now. Without that access I can't verify the create_dv/source_dict refactor's callers, the utilities/unittests/conftest.py mocking changes, or trace smoke/gating test impact — and I don't want to post an unverified plan with guessed True/False decisions.

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[acinko-rh]

/lgtm

[josemacassan]

/lgtm

[vsibirsk]

/approve

[openshift-virtualization-qe-bot-2]

Successfully removed PR tag: quay.io/openshift-cnv/openshift-virtualization-tests:pr-5528.

[openshift-virtualization-qe-bot-2]

New container for quay.io/openshift-cnv/openshift-virtualization-tests:cnv-4.22 published