ci: update ESRP code signing to v6 - #3168

'KiotaJsonSerializer.SerializeAsStringAsync<T>(T, CancellationToken)' is obsolete: 'This method is obsolete, use SerializeAsStringAsync with optional CancellationToken parameter instead'

'X509Certificate2.X509Certificate2(byte[], SecureString?)' is obsolete: 'Loading certificate data through the constructor or Import is obsolete. Use X509CertificateLoader instead to load certificates.' (https://aka.ms/dotnet-warnings/SYSLIB0057)

'SharedWithMeRequestBuilder.GetAsSharedWithMeGetResponseAsync(Action<RequestConfiguration<SharedWithMeRequestBuilder.SharedWithMeRequestBuilderGetQueryParameters>>?, CancellationToken)' is obsolete: 'This API is deprecated and will stop returning data after November, 2027. as of 2025-11/Removal on 2025-11-13 and will be removed 2027-11-01'

'KiotaJsonSerializer.SerializeAsStringAsync<T>(T, CancellationToken)' is obsolete: 'This method is obsolete, use SerializeAsStringAsync with optional CancellationToken parameter instead'

'KiotaJsonSerializer.SerializeAsStringAsync<T>(T, CancellationToken)' is obsolete: 'This method is obsolete, use SerializeAsStringAsync with optional CancellationToken parameter instead'

'KiotaJsonSerializer.SerializeAsStringAsync<T>(T, CancellationToken)' is obsolete: 'This method is obsolete, use SerializeAsStringAsync with optional CancellationToken parameter instead'

'this' argument does not satisfy 'DynamicallyAccessedMemberTypes.NonPublicFields' in call to 'System.Type.GetFields(BindingFlags)'. The return value of method 'System.Type.BaseType.get' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.

'this' argument does not satisfy 'DynamicallyAccessedMemberTypes.NonPublicFields' in call to 'System.Type.GetFields(BindingFlags)'. The return value of method 'System.Type.BaseType.get' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.

'this' argument does not satisfy 'DynamicallyAccessedMemberTypes.NonPublicFields' in call to 'System.Type.GetFields(BindingFlags)'. The return value of method 'System.Type.BaseType.get' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.

'this' argument does not satisfy 'DynamicallyAccessedMemberTypes.NonPublicFields' in call to 'System.Type.GetFields(BindingFlags)'. The return value of method 'System.Type.BaseType.get' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.