fix(acs-ci): use absolute gcloud path

[robbycochran]

OpenShell replaces the sandbox PATH at runtime, so the first gcloud migration could not find the image-installed CLI even though the image contains it. Use the pinned absolute path in the trusted preflight command; it matches the task policy executable rule.

Summary by CodeRabbit

• Bug Fixes
  • Improved reliability of the GCS preflight check by explicitly locating the Google Cloud CLI executable.
  • Existing timeout, bucket selection, output handling, and pass/fail behavior remain unchanged.

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ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 7a91533 and f58a6e3.

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• tasks/acs-ci-nightly/workflow/preflight.yaml

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Walkthrough

The GCS preflight check now invokes gcloud through /opt/google-cloud-sdk/bin/gcloud. Its timeout, bucket target, output handling, and pass/fail behavior are unchanged.

Changes

GCS preflight

Layer / File(s)	Summary
Use the absolute gcloud path tasks/acs-ci-nightly/workflow/preflight.yaml	The GCS check resolves gcloud through /opt/google-cloud-sdk/bin/gcloud. The 30-second timeout and remaining arguments are unchanged.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to f58a6

The preflight command now uses the pinned absolute gcloud path while preserving its existing behavior, so it is mergeable.

🚥 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 clearly and concisely describes the main change: using an absolute gcloud path in ACS CI.
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.

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