MPG migration - Attestation

[mzhongl524]

TSP PR: Azure/azure-rest-api-specs#39250 (merged)

TSP PR: Azure/azure-rest-api-specs#40223

Fixes #54478
Blocked by

• [Azure Mgmt Generator] support legacy operation's ListSinglePage operation #54518
• [TCGC] add markAsPageable decorator typespec-azure#3650

The main issues are as follows：

• Failed to generate AttestationPrivateEndpointConnectionResource. Tried renaming and handling on the client side, but it still was not generated.
• The id parameter type cannot be converted from string to Azure.Core.ResourceIdentifier, which means that the type currently being generated is string.

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[github-actions]

API Change Check

APIView identified API level changes in this PR and created the following API reviews

Azure.ResourceManager.Attestation

[Copilot]

Pull request overview

This pull request migrates the Azure.ResourceManager.Attestation SDK from the autorest-based generator to the Management Plane Generator (MPG/TypeSpec). The PR includes updates to both the data plane SDK (to suppress obsolete warnings) and the resource manager SDK (complete regeneration with TypeSpec).

Changes:

• Suppression of SYSLIB0057 warnings in data plane SDK for X509Certificate2 usage
• Complete regeneration of resource manager SDK using TypeSpec
• Test updates to reflect API changes in the generated code
• Addition of tsp-location.yaml configuration file

Reviewed changes

Copilot reviewed 16 out of 103 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
PolicyCertificatesResult.cs, AttestationSigner.cs, AttestationToken.cs, AttestationAdministrationClient.cs	Added pragma warnings to suppress SYSLIB0057 for obsolete X509Certificate2 constructor usage
tsp-location.yaml	New TypeSpec configuration file specifying the spec location and generator settings
Test files (PrivateEndpointConnectionTests.cs, AttestationProviderTest.cs, ResourceDataHelper.cs)	Updated to use new property names (ConnectionState → PrivateLinkServiceConnectionState, AttestationProviderCreateOrUpdateContent → AttestationServiceCreationParams)
Sample files	Updated to reflect API changes including method name changes and return type changes
Generated model files	Complete regeneration with new serialization patterns, property structures, and helper classes
Internal helper files	New internal helper classes for serialization, pagination, and type formatting
LongRunningOperation files	Updated to use new Azure SDK patterns
Collection results	New pageable collection implementation classes

[jsquire]

Please don't do this - ESPECIALLY for obsolete members. In this case, the fix is easy and should be made as part of this PR. After, please file an issue for the Attestation team (marked "Service Attention") to follow-up and review before their next release.

[jsquire]

This cannot be merged.

[jsquire]

This cannot be merged.