Feature Request: Enable Workload Identity Federation (WIF) in 1ES Pipeline for VS Code AKS Extension

## Feature Request: Enable Workload Identity Federation (WIF) in 1ES Pipeline for VS Code AKS Extension

### Summary

- Moving around the pipeline to the `.azurepipeline` location and associated changes.
- Refactoring any necessary / necessary parts.

Request to enable Workload Identity Federation (WIF) support in the 1ES pipeline used for publishing and signing the VS Code AKS extension, replacing the current reliance on long-lived secrets (e.g., PATs or service principal credentials).

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### Proposal

Introduce Workload Identity Federation (WIF) support in the 1ES pipeline to enable **keyless, short-lived authentication** for:

1. VS Code Marketplace publishing
2. Artifact signing workflows
3. Access to dependent Azure resources (if applicable)