LCORE-861: Azure Entra ID Authentication

[asimurka]

Description

Adds full Azure Entra ID authentication support, including new config block for LCORE, token management module, unit tests, integration into the inference, and example configuration files.

Note: Waiting for Llama Stack 0.2.23
The patch will contain the following necessary fix: llamastack/llama-stack#4066

Type of change

• Refactor
• New feature
• Bug fix
• CVE fix
• Optimization
• Documentation Update
• Configuration Update
• Bump-up service version
• Bump-up dependent library
• Bump-up library or tool used for development (does not change the final image)
• CI configuration change
• Konflux configuration change
• Unit tests improvement
• Integration tests improvement
• End to end tests improvement

Related Tickets & Documents

• Related Issues # LCORE-862 LCORE-862 LCORE-864 LCORE-865 LCORE-867
• Closes #

Checklist before requesting a review

• I have performed a self-review of my code.
• PR has passed all pre-merge test jobs.
• If it is a core feature, I have added thorough tests.

Testing

• Please provide detailed steps to perform tests related to this code change.
• How were the fix/results from this change verified? Please provide relevant screenshots or results.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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