Guarantee that ANCM package dlls are used for back compat tests #10858
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Fixes https://github.com/aspnet/AspNetCore-Internal/issues/2620. Also renames a few projects to avoid confusion.
TL;DR we have tests that use an older version of the AspNetCoreModule, which are copied to a bin folder eventually. These references can race with build outputs from the project build itself. We had a check to look a the full path to the dll and remove all ANCM references from the project build. This broke with dc90e11, which caused flakiness with copying, causing weird test failures like shown above.
@natemcmaster I'm not a fan at all of the solution I came up with. Fundamentally, this all stems from this specific test group referencing M.A.Servers.IntegrationTesting.IIS. Maybe I can conditionally depend on the native components in this specific project instead, such that this race never happens.