🧹 chore: Right-size Depot runners

[jpmcb]

👨🏼

Refs PCC-1288

🤖

Right-sizes compute-heavy Depot runners for PCC-1288.

• Uses 4 CPU / 16 GB runners for routine build, test, and image jobs.
• Leaves lightweight metadata and administrative jobs on the base runner.

Validation

• Parsed all changed workflow YAML with Ruby Psych
• Ran git diff --check

[linear-code]

PCC-1288

[greptile-apps]

Greptile Summary

This PR right-sizes compute-heavy Linux build jobs by moving them to Depot’s 4 CPU / 16 GB runner while leaving lightweight jobs unchanged.

• Updates the CI Linux build runner.
• Updates the nightly Linux build runner.
• Updates the published-release Linux build runner.

Confidence Score: 5/5

The PR appears safe to merge.

The changes only select a valid right-sized Depot runner for three existing Linux build jobs, with workflow dependencies, commands, permissions, and artifact contracts unchanged.

Important Files Changed

Filename	Overview
.github/workflows/ci.yaml	Moves the Linux build job to the valid 4 CPU Depot runner label without changing build or artifact behavior.
.github/workflows/nightly.yaml	Moves the nightly Linux artifact build to the valid 4 CPU Depot runner label while preserving release dependencies.
.github/workflows/release.yaml	Moves the published-release Linux build to the valid 4 CPU Depot runner label without changing permissions or release flow.

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