Add out-of-proc test for request queue delegation

[shirhatti]

All the Http.Sys tests only verify delegating requests between two different Http.Sys queues in the same process. There are some behavioral differences (such as #28336 ) that it would be good to validate

[ghost]

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[adityamandaleeka]

We should be able to get this in for 6 since test-only changes have a bit more runway. At the very least we should get the test done in main in the 6.0 timeline, even if we don't get it into the 6.0 branch

[shirhatti]

How do I write an out-of-proc test? @Tratcher is there a comparable test I can look at?

[Tratcher]

Start here: https://github.com/dotnet/aspnetcore/blob/main/src/Servers/test/FunctionalTests/HelloWorldTest.cs

[Tratcher]

Or here:

aspnetcore/src/Hosting/test/FunctionalTests/ShutdownTests.cs

Line 57 in a9986c3

var deploymentParameters = new DeploymentParameters(