Remove UseOptimizedPublish=false from trimming tests after updating to the .NET 11 GA SDK #136283

Cleanup

Remove <UseOptimizedPublish>false</UseOptimizedPublish> from eng/testing/linker/SupportFiles/Directory.Build.props once dotnet/runtime updates to the .NET 11.0 GA SDK.

Background

The workaround is being added in #136229 after the SDK update from RC1 to 11.0.100-rc.2.26504.105. Both Linux and Windows NativeAOT test-app jobs fail in Microsoft.Extensions.Options.TrimmingTests/ConfigureTests with CS0111 for the generated LocalOptionsValidator.Validate method and CS0433 for generated validation attributes.

The RC2 SDK enables optimized NativeAOT publishing by default (dotnet/sdk#54515). The opt-out restores the full Build target sequence without disabling NativeAOT or trimming. The failing binlog confirms that optimized publishing was enabled; the workaround has not yet been confirmed by a CI rerun.

CI evidence: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1644729

Completion criteria

• Update to the .NET 11.0 GA SDK.
• Remove the opt-out and rerun the trimming/NativeAOT test-app jobs on Linux and Windows, including ConfigureTests.
• Confirm the jobs pass with optimized publishing enabled. If the failure persists, investigate the SDK integration rather than assuming GA fixes it.