ci: pin GitHub Actions to commit SHAs (7)

[mirkosalvato1-ctrl]

Why

Mutable Action tags (@v4, @main) can be retagged, which is a supply-chain risk.
This PR pins third-party Actions to full commit SHAs while keeping the tag in a comment.
Official actions/* tags are left unchanged (common maintainer preference).

Pins

• actions/github-script@v7 -> f28e40c7f34b
• actions/github-script@v7 -> f28e40c7f34b
• actions/github-script@v7 -> f28e40c7f34b
• azure/login@v2 -> a457da9ea143
• azure/cli@v2 -> 9f7ce6f37c31
• azure/login@v2 -> a457da9ea143
• azure/cli@v2 -> 9f7ce6f37c31

Reference: GitHub docs on using third-party actions securely.

🤖 PR Validation — ️✔️ All clear

Breaking Changes
️✔️ None

[azure-client-tools-bot-prd]

Hi @mirkosalvato1-ctrl,
Please write the description of changes which can be perceived by customers into HISTORY.rst.
If you want to release a new extension version, please update the version in setup.py as well.

[azure-pipelines]

Azure Pipelines:
There may be pipelines that require an authorized user to comment /azp run to run.

[Copilot]

Pull request overview

This PR reduces GitHub Actions supply-chain risk by pinning third-party uses: references to immutable commit SHAs (while keeping the original tag noted in an inline comment) in several CI workflows.

Changes:

• Pinned azure/login and azure/cli action references from @v2 to full commit SHAs in release-trigger workflows.
• Pinned actions/github-script from @v7 to a full commit SHA in PR-governance workflows.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
.github/workflows/TriggerExtensionRelease.yml	Pins azure/login and azure/cli to commit SHAs for the extension release trigger workflow.
.github/workflows/TestTriggerExtensionRelease.yml	Pins azure/login and azure/cli to commit SHAs for the test trigger workflow.
.github/workflows/CCOA.yml	Pins actions/github-script to a commit SHA for labeling/commenting automation.
.github/workflows/BlockPRMerge.yml	Pins actions/github-script to a commit SHA for label-based merge blocking.

[yonzhan]

ci

[VeryEarly]

/azp run

[azure-pipelines]

Azure Pipelines:
Successfully started running 2 pipeline(s).

[VeryEarly]

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