Exclude the partition filter from test expansion

[chris-smith-zocdoc]

Addressing my comment here #1138 (comment)

I saw the category filter doing this already and copied its approach. Please let me know if there is another approach you think I should take

[chris-smith-zocdoc]

@dotnet-policy-service agree company="Zocdoc"

[OsirisTerje]

@chris-smith-zocdoc Can you update?

[chris-smith-zocdoc]

@OsirisTerje I rebased, is there anything else I should do?

If this approach is good with you I can also add tests, just need some guidance on where they should go and how to run them (I'm on Mac and am unfamiliar with Cake)

[OsirisTerje]

@chris-smith-zocdoc Thanks!

Building with cake is straightforward. I am not familiar with Mac command line, but if you can run either the build.cmd file or the build.ps1 (powershell), or you can create a similar one for Mac,

To build: build
To test: build -t test
To run the acceptance tests: build -t acceptance
(And for reference, to build a nuget package: build -t package)

The acceptance tests uses code for the test project and test class embedded in the test. It then starts up the test system,
includes the adapter package and run it.

[OsirisTerje]

@chris-smith-zocdoc I'll merge this now, in order to get it into version 4.6.

Would be nice if you managed to get some tests around it though, but it can in a separate PR.