Add partition filter parsing to the adapter

[stevenaw]

We added partitioning to the framework in nunit/nunit#4391

https://github.com/nunit/nunit/blob/6fa2c0cc21c08e2b229c248b1af228e4596f4e71/src/NUnitFramework/framework/Internal/TestFilter.cs#L191-L193

Parsing support was added to the console in nunit/nunit-console#1346

@OsirisTerje noted that we need to add parsing support in the adapter as well nunit/nunit#4391 (comment)

[OsirisTerje]

@Plasma Do you want to grab this one too?

[chris-smith-zocdoc]

@OsirisTerje I may have some bandwidth to take this, can you point me at the correct file I should be looking at?

[chris-smith-zocdoc]

@OsirisTerje I took a look at this, and it appears to already work with the latest master/pre-release version on myget.

<PackageReference Include="NUnit3TestAdapter" Version="5.0.0-beta.2" />

I see the partitioning working when I run it like this

dotnet test -v:n -- NUnit.Where='partition==2/2' NUnit.Verbosity=5

Is there somewhere I can track for the 5.0.0 release? I'll see if we're able to use the myget version until its published on nuget

[chris-smith-zocdoc]

It does look like the partition isn't passed directly though though, the test discovery appears to transform it into

<filter><or><test>one</test><test>two</test></or></filter>

which isn't ideal