Migrate away from deprecated ioutil

[sebrandon1]

ioutil has been deprecated since Go 1.16: https://go.dev/doc/go1.16#ioutil

Tracking issue: redhat-best-practices-for-k8s/telco-bot#52

Summary by CodeRabbit

• Chores
  • Modernized internal code by updating file I/O operations to use current standard library APIs, removing usage of deprecated functions and improving codebase maintainability.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

Configuration used: Repository: openshift/coderabbit/.coderabbit.yaml

Review profile: CHILL

Plan: Pro

Cache: Disabled due to data retention organization setting

Knowledge base: Disabled due to data retention organization setting

📥 Commits

Reviewing files that changed from the base of the PR and between abbd268 and 11b7f09.

📒 Files selected for processing (2)

• pkg/cmd/render/render.go
• pkg/operator/kube_cloud_config/bootstrap.go

🚧 Files skipped from review as they are similar to previous changes (2)

• pkg/cmd/render/render.go
• pkg/operator/kube_cloud_config/bootstrap.go

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Walkthrough

Replaced deprecated ioutil.ReadFile/ioutil.WriteFile calls with os.ReadFile/os.WriteFile and removed unused ioutil imports. No functional changes to control flow, error handling, or exported declarations.

Changes

Cohort / File(s)	Summary
I/O API modernization pkg/cmd/render/render.go, pkg/operator/kube_cloud_config/bootstrap.go	Replaced ioutil.ReadFile/ioutil.WriteFile with os.ReadFile/os.WriteFile and removed unused ioutil imports. No semantic or control-flow changes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Migrate away from deprecated ioutil' accurately summarizes the main change in the pull request, which involves replacing deprecated ioutil functions with their os package equivalents across two files.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Stable And Deterministic Test Names	✅ Passed	PR modifies only non-test source files replacing deprecated ioutil calls with os equivalents; no test files or test names are modified.
Test Structure And Quality	✅ Passed	This PR refactors production files to replace deprecated ioutil functions with os package equivalents. No test files are modified, making test quality checks not applicable.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

---

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: sebrandon1
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[openshift-ci]

@sebrandon1: 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/e2e-aws-ovn-techpreview	11b7f09	link	true	/test e2e-aws-ovn-techpreview
ci/prow/e2e-aws-ovn	11b7f09	link	true	/test e2e-aws-ovn

Full PR test history. Your PR dashboard.

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