.Net: ConditionalTheory attribute does not work as expected

[adamsitnik]

The attribute points to the fact discoverer, while it should point to a theory discoverer:

semantic-kernel/dotnet/src/VectorDataIntegrationTests/VectorDataIntegrationTests/Xunit/ConditionalTheoryAttribute.cs

Lines 9 to 10 in 3a36d40

	[XunitTestCaseDiscoverer("VectorDataSpecificationTests.Xunit.VectorStoreFactDiscoverer", "VectorDataIntegrationTests")]
	public sealed class ConditionalTheoryAttribute : TheoryAttribute;

I took a quick look at how it's implemented by Microsoft.DotNet.XUnitExtensions and got to the conclusion that I won't fix that in my current PR (too much noise, I want to get it merged)

https://github.com/dotnet/arcade/blob/main/src/Microsoft.DotNet.XUnitExtensions/src/Discoverers/ConditionalTheoryDiscoverer.cs

Should we just take a dependency on Microsoft.DotNet.XUnitExtensions ?

cc @roji @westey-m