fix: Fixed deployment script issue for AVM module, fixed relative path issues & refactored bicep

[Prajwal-Microsoft]

Purpose

• ...
  This pull request updates the infra/main.bicep infrastructure-as-code template with improvements to resource parameter descriptions, module versions, resource tagging, and deployment logic. The changes modernize the template, enhance maintainability, and align resource configurations with best practices.

Key improvements include:

Parameter and Metadata Enhancements

• Improved parameter descriptions for clarity and consistency, and made solutionName optional with a default value.

Module and Resource Updates

• Upgraded versions for several AVM modules, including Log Analytics Workspace, Application Insights, Bastion Host, Virtual Machine, Private DNS Zone, and Managed Identities, to leverage new features and bug fixes.
• Updated the Cognitive Services and Search Service modules to new versions, enabling telemetry, disabling local auth by default, and modernizing configuration options.

Tagging and Resource Group Management

• Changed the resource group tags resource to use a newer API version and restructured the tag merging logic to ensure all necessary metadata is included, such as deployment name and use case.

AI Services and Deployment Logic

• Refactored AI model deployments to use a loop for improved scalability and maintainability, and corrected model property assignments.
• Updated the Cognitive Services Content Understanding deployment to use a new module version, changed the custom subdomain variable, and enforced managed identity and local auth settings.

Miscellaneous Improvements

• Updated the API version for the Cognitive Services projects/connections resource.
• Made minor variable and formatting adjustments for clarity and future compatibility.

These changes collectively improve the maintainability, security, and clarity of the infrastructure codebase.

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

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Other Information

[github-actions]

🎉 This PR is included in version 3.17.1 🎉

The release is available on GitHub release

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