fix: Role assignment issue for running post deployment script

[Prajwal-Microsoft]

Purpose

• ...
  This pull request updates role assignments for Azure Cognitive Services and VM script setup modules to use the new "Azure AI User" role instead of the older "Cognitive Services OpenAI User" role. The changes ensure that the correct role definition ID is used throughout the infrastructure code, improving consistency and future-proofing role assignments.

Role assignment updates:

• Updated the role assignment in infra/modules/cognitive-services/cognitiveServices.bicep to include the new "Azure AI User" role using its role definition ID (53ca6127-db72-4b80-b1b0-d745d6d5456d).

Variable and resource changes:

• Introduced a new variable azureAIUserRoleId in infra/modules/vmscriptsetup.bicep to reference the "Azure AI User" role definition ID.
• Replaced the use of the old "Cognitive Services OpenAI User" role with the new "Azure AI User" role in the role assignment resource, ensuring the correct role definition ID is used for VM script setup.

Does this introduce a breaking change?

• Yes
• No

Golden Path Validation

• I have tested the primary workflows (the "golden path") to ensure they function correctly without errors.

Deployment Validation

• I have validated the deployment process successfully and all services are running as expected with this change.

What to Check

Verify that the following are valid

• ...

Other Information

[github-actions]

🎉 This PR is included in version 1.1.3 🎉

The release is available on GitHub release

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