Add support for pulling the UPN json string, Fixes AB#3478938

[fadidurah]

This PR expands our automation code to enable pulling the upn json string from the MobileBuildVault Key Vault

AB#3478938

[github-actions]

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[github-actions]

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[Copilot]

Pull request overview

This PR expands automation code capabilities by adding support for retrieving account UPN JSON data from the MobileBuildVault Key Vault. The changes introduce a new Key Vault endpoint configuration and add a method to fetch and cache a JSON structure containing user identifiers for test automation.

Key Changes

• Introduced support for multiple Key Vault URLs (MSIDLABS and MobileBuildVault) in KeyVaultSecretsApi
• Renamed getKeyVaultSecret() to getPasswordSecretFromLabsKeyVault() for better semantic clarity
• Added new getAccountUpnJsonFromMobileBuildKeyVault() method with static caching to retrieve and cache account UPN mappings from MobileBuildVault

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
labapi/src/main/java/com/microsoft/identity/internal/test/labapi/api/KeyVaultSecretsApi.java	Introduced public constants for MSIDLABS and MobileBuildVault URLs to support multiple Key Vault sources
LabApiUtilities/src/main/com/microsoft/identity/labapi/utilities/client/ILabClient.java	Renamed interface method and added new method signature for fetching account UPN JSON from MobileBuildVault
LabApiUtilities/src/main/com/microsoft/identity/labapi/utilities/client/LabClient.java	Implemented renamed method, added new cached UPN JSON fetching method with static caching, and defined public constants for JSON structure keys
LabApiUtilities/src/test/com/microsoft/identity/labapi/utilities/client/LabClientTest.java	Added integration tests validating password secret retrieval and account UPN JSON structure from Key Vaults

[mohitc1]