Enable Datagram_UDP_AccessDenied_Throws_DoesNotBind test on MacCatalyst x64

[liveans]

Fixes #114450

[Copilot]

Pull Request Overview

This PR enables a previously disabled UDP test on macOS Catalyst x64 platform by removing the ActiveIssue attribute that was preventing it from running. The change addresses issue #114450 by allowing the Datagram_UDP_AccessDenied_Throws_DoesNotBind test to run on MacCatalyst x64 systems.

• Removes platform-specific test skip condition for MacCatalyst x64

[liveans]

/azp run runtime-extra-platforms

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[rzikm]

There still seem to be test failures, e.g. on machine dci-macm1-build-009 running macOS-26.0.1 https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-heads-main-15b68bbf149843cbaf/System.Net.Sockets.Tests/3/console.ee98b396.log?helixlogtype=result

[liveans]

There still seem to be test failures, e.g. on machine dci-macm1-build-009 running macOS-26.0.1 https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-heads-main-15b68bbf149843cbaf/System.Net.Sockets.Tests/3/console.ee98b396.log?helixlogtype=result

I think for now, it's better to disable all tests which is failing for this reason and open a generic tracking issue for this change in the infra.