Convert code-mirror.yml to 1ES Official Pipeline Template

[Copilot]

Issue describing the changes in this PR

Migrates eng/ci/code-mirror.yml from legacy template to 1ES Official Pipeline Template format, matching the structure of official-build.yml.

Pull request checklist

• My changes do not require documentation changes
  • Otherwise: Documentation issue linked to PR
• My changes are added to the CHANGELOG.md
• I have added all required tests (Unit tests, E2E tests)

Additional information

Changes:

• Added 1ESPipelineTemplates/1ESPipelineTemplates repository reference with alias 1ESPipelineTemplates (instead of 1es) to avoid repository alias conflicts with the referenced ci/code-mirror.yml@eng template
• Changed base template from ci/code-mirror.yml@eng to v1/1ES.Official.PipelineTemplate.yml@1ESPipelineTemplates
• Configured 1ES-compliant pool: 1es-pool-azfunc with Windows 2022 image
• Added SDL configuration (SpotBugs disabled, consistent with official-build.yml)
• Wrapped original code-mirror template within stages parameter
• Added pr: none trigger exclusion
• Reorganized structure to match official-build.yml

The pipeline maintains its original code mirroring functionality while now operating within the Microsoft 1ES security and compliance framework. The use of 1ESPipelineTemplates as the repository alias follows the pattern established in release.yml and prevents conflicts when the pipeline references external engineering templates.

Original prompt

On code-mirror.yml, Change the code-mirror.yml to a 1ES template like the official-build.yml

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[torosent]

@copilot Encountered error(s) while parsing pipeline YAML:
A repository already exists with alias 1es
/eng/ci/code-mirror.yml: Object reference not set to an instance of an object.

[Copilot]

@copilot Encountered error(s) while parsing pipeline YAML:
A repository already exists with alias 1es
/eng/ci/code-mirror.yml: Object reference not set to an instance of an object.

Fixed in ff6bb39. Changed the repository alias from 1es to 1ESPipelineTemplates to avoid conflicts with the ci/code-mirror.yml@eng template which likely already defines a 1es repository internally. This pattern matches the release.yml configuration.

[jviau]

@torosent do you know why this is change is being made? code-mirror extends 1ESPT already: https://dev.azure.com/azfunc/internal/_git/engineering?path=/ci/code-mirror.yml. And we want unofficial here, the code-mirror pipeline should be marked as non-production. If it isn't non-production, you can change it to non-prod via product catalog if you are a service admin. https://aka.ms/productcatalog

[torosent]

@torosent do you know why this is change is being made? code-mirror extends 1ESPT already: https://dev.azure.com/azfunc/internal/_git/engineering?path=/ci/code-mirror.yml. And we want unofficial here, the code-mirror pipeline should be marked as non-production. If it isn't non-production, you can change it to non-prod via product catalog if you are a service admin. https://aka.ms/productcatalog

SFI. This was marked as production

[jviau]

This is not how code-mirror is intended to be used. I'd like to understand what motivated this change.