Add build validation step to publish pipeline

[Copilot]

The publish pipeline lacked visibility into which official build was being used for release, making it difficult to verify the correct artifacts were being published.

Changes

• Added ValidateBuild job that runs first in the release stage
• Displays build metadata (Run ID, Run Name, Source Branch, Source Commit) from the officialPipeline resource
• AdoRelease job now depends on ValidateBuild

- job: ValidateBuild
  displayName: Validate Build
  steps:
  - pwsh: |
      Write-Host "Run ID: $(resources.pipeline.officialPipeline.runID)"
      Write-Host "Run Name: $(resources.pipeline.officialPipeline.runName)"
      Write-Host "Source Branch: $(resources.pipeline.officialPipeline.sourceBranch)"
      Write-Host "Source Commit: $(resources.pipeline.officialPipeline.sourceCommit)"
    displayName: 'Display Build Information'

Original prompt

updathe the durabletask-dotnet.publish pipeline to validate the build it attemps to publish nuget packages from the build that is identified for the release

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