Add PreAuthorizedApplications parameter support to Set-EntraBetaApplication

[givinalis]

Changes

• This PR adds support for the -PreAuthorizedApplications parameter in the Set-EntraBetaApplication cmdlet, enabling users to configure pre-authorized applications for an Entra application.
• Added 4 new comprehensive test cases for PreAuthorizedApplications functionality.

Problem

Previously, when users passed PreAuthorizedApplications objects to Set-EntraBetaApplication, the parameter was not being properly processed and passed to the underlying Update-MgBetaApplication Graph API call. This meant users could not configure pre-authorized applications through this cmdlet.

Issue

Resolves issue: #1575

[learn-build-service-prod]

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