[SDCICD-1737] Add S3 artifact URLs to Pod termination message

[YiqinZhang]

Link S3 artifact URLs to Pod termination message for downstream consumption (qontract-reconcile, Tekton Results, etc.).

Changes:

• Output structured JSON to stdout with ###OSDE2E_ARTIFACTS_JSON### markers
• Write to /dev/termination-log (standard Kubernetes pattern)
• Use SetEscapeHTML(false) to keep presigned URLs valid
• S3 uploads only relevant test artifacts: .xml, .log, .yaml, .yml, .json, .png, .jpg, .jpeg, .gif, .csv, .txt, .html

Usage
From Pod status
kubectl get pod <pod> -o jsonpath='{.status.containerStatuses[0].state.terminated.message}'

From logs
kubectl logs <pod> | grep -A1 "###OSDE2E_ARTIFACTS_JSON###"

Output
{
"s3Uri": "s3://osde2e-loki-logs/test-results/...",
"junitUrl": "https://...?X-Amz-Algorithm=...&X-Amz-Credential=...",
"logsUrl": "https://...?X-Amz-Algorithm=...&X-Amz-Credential=..."
}

SDCICD-1737

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: YiqinZhang

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[YiqinZhang]

/test ci/prow/hypershift-pr-check

[YiqinZhang]

/test hypershift-pr-check

[YiqinZhang]

/test hypershift-pr-check

[YiqinZhang]

/test hypershift-pr-check

[openshift-ci]

@YiqinZhang: The following test 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/hypershift-pr-check	81d8fa6	link	true	/test hypershift-pr-check

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