CI: rename GCP subnets used for integration specs

[aramprice]

Pipeline already reconfigured.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 89358074-4cf9-4b79-b072-2df42e4a388b

📥 Commits

Reviewing files that changed from the base of the PR and between e73c878 and e079e55.

📒 Files selected for processing (2)

• ci/pipelines/builder.yml
• ci/pipelines/vars.yml

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Walkthrough

This change updates GCP infrastructure naming in pipeline configuration files. The ci/pipelines/builder.yml file has subnet naming conventions updated from bosh-integration- prefix to stemcell-builder-integration- prefix across multiple director deploy tasks and bats configuration parameters. Additionally, ci/pipelines/vars.yml updates the stemcell_details.subnet_int value from "3" to "22", with an inline comment indicating this should reflect the last two digits of the release year.

Suggested reviewers

• rkoster
• benjaminguttmann-avtq

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	No description was provided by the author, making it impossible to assess whether the description relates to the changeset.	Add a description explaining the purpose and impact of the GCP subnet renaming changes to provide context for reviewers.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: renaming GCP subnet naming conventions from 'bosh-integration-...' to 'stemcell-builder-integration-...' across pipeline configuration files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch rename-integration-subnets

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[Copilot]

Pull request overview

Renames the GCP subnets used by the CI integration/bats pipelines to a new stemcell-builder-integration-* naming scheme, and updates the subnet index used to derive CIDRs/IPs.

Changes:

• Update stemcell_details.subnet_int from "3" to "22" (used for IP/CIDR derivation).
• Rename GCP_SUBNET_NAME / VARS_SUBNETWORK_DEFAULT values from bosh-integration-* to stemcell-builder-integration-* (including ipv6 variant).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
ci/pipelines/vars.yml	Updates the subnet index (subnet_int) used across GCP integration jobs.
ci/pipelines/builder.yml	Renames the GCP subnet names referenced by integration and BATs jobs (ipv4 + ipv6).

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