Migrate Create-APIReview script from API Key to Azure AD authentication

[Copilot]

• Review Azure SDK PR #13235 pattern for removing API Key authentication
• Update Create-APIReview.ps1 to remove API Key parameter and add Bearer token authentication
  • Removed $APIKey parameter from script
  • Added Get-ApiViewBearerToken() function that acquires Azure AD tokens via az account get-access-token
  • Updated Upload-SourceArtifact to use Bearer token instead of API Key
  • Updated Upload-ReviewTokenFile to use Bearer token instead of API Key
  • Changed API endpoints from UploadAutoReview to upload and CreateApiReview to create (lowercase)
  • Changed HTTP method from GET to POST for the create endpoint
  • Improved error handling with more detailed error messages
• Update create-apireview.yml to use AzureCLI@2 task instead of Powershell@2 task
  • Changed task from Powershell@2 to AzureCLI@2
  • Added AzureServiceConnection parameter with default value "APIView prod deployment"
  • Removed -APIKey $(azuresdk-apiview-apikey) argument
  • Removed pwsh: true (not needed with AzureCLI@2)
  • Added azureSubscription, scriptType, and scriptLocation inputs
• Address security concern: removed potentially sensitive token response from error logging

Original prompt

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This section details on the original issue you should resolve

<issue_title>Stop using Api Key in Create-ApiReview script</issue_title>
<issue_description>We can follow the same pattern as used in Azure/azure-sdk-tools#13235

And apply those changes to https://github.com/microsoft/typespec/blob/main/eng/emitters/scripts/Create-APIReview.ps1

Also need to update https://github.com/microsoft/typespec/blob/main/eng/emitters/pipelines/templates/steps/create-apireview.yml</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Stop using Api Key in Create-ApiReview script #9500

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