ci: use free hosted runner for install tests

[Erik Osterman (Cloud Posse) (osterman)]

Summary

Move the public repository’s remaining RunsOn install job to ubuntu-latest. Standard GitHub-hosted runners are free for public repositories.

The hosted runner exposed pre-existing default-branch drift that the old RunsOn dependency cache had masked: package.json no longer matched yarn.lock, ESLint 10 was incompatible with the repository’s legacy ESLint configuration/plugins, and the checked-in dist/ bundle was stale. This PR reconciles both lockfiles, restores the compatible ESLint 8.57.1 line, and commits the reproducible Node 24 action bundle.

Validation

• yarn --frozen-lockfile --prefer-offline
• yarn lint:check
• yarn format:check
• yarn test:coverage: 63 tests pass; 96.61% line and 96.92% statement coverage
• yarn clean && yarn build && yarn build:wrapper
• generated dist/ verification passes
• actionlint passes
• no RunsOn routing labels remain in test-install.yaml

Expected savings: approximately $25–50/month.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: e8218ebd-058d-45b0-8b1d-45ca601ef4ed

📥 Commits

Reviewing files that changed from the base of the PR and between cd92482 and 6091481.

⛔ Files ignored due to path filters (4)

• dist/index.js is excluded by !**/dist/**
• dist/wrapper/index.js is excluded by !**/dist/**
• package-lock.json is excluded by !**/package-lock.json
• yarn.lock is excluded by !**/yarn.lock, !**/*.lock

📒 Files selected for processing (1)

• package.json

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📝 Walkthrough

Walkthrough

The test job now uses ubuntu-latest. The eslint development dependency is pinned to version 8.57.1 instead of 10.8.1.

Changes

Workflow runner update

Layer / File(s)	Summary
Test runner configuration .github/workflows/test-install.yaml	The test job now uses ubuntu-latest instead of the custom runner configuration.

ESLint version update

Layer / File(s)	Summary
ESLint dependency configuration package.json	The eslint development dependency is pinned to 8.57.1 instead of 10.8.1.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: ⚪ Minimal · up to 60914

No actionable merge-blocking risk remains in the reviewed changes.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description check	✅ Passed	The description clearly explains the runner change, related compatibility fixes, validation steps, and expected cost savings. It is directly related to the changeset.
Title check	✅ Passed	The title clearly summarizes the primary change: moving install tests to a free GitHub-hosted runner. It is concise and specific.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Commit to this branch
• Create a new PR

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[Erik Osterman (Cloud Posse) (osterman)]

Validation note: the changed test-install.yaml job passes on ubuntu-latest, and the full integration matrix passes. The separate build check fails before build because the existing yarn.lock is inconsistent with package.json (yarn --frozen-lockfile); this PR does not modify package metadata or lockfiles.

[Igor Rodionov (goruha)]

Copilot fix https://github.com/cloudposse/github-action-setup-atmos/actions/runs/35154392702/job/104990243149?pr=121

[Copilot]

Copilot fix https://github.com/cloudposse/github-action-setup-atmos/actions/runs/35154392702/job/104990243149?pr=121

Fixed in fa8a551: restored the repo to ESLint 8.57.1, refreshed the lockfiles, and rebuilt dist/. I also validated the full CI build job locally under Node 24 (yarn --frozen-lockfile --prefer-offline, lint, format, tests, and both builds).

[Erik Osterman (Cloud Posse) (osterman)]

CodeRabbit (@coderabbitai) review

[coderabbitai]

✅ Action performed

Review finished.

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[github-actions]

These changes were released in v3.6.0.