Move ghcide-test to stand alone dir (#4520)

* Add multiple new Haskell modules and configuration files

* Fix directory paths for test data and source directories

* Remove unnecessary test data files from the cabal configuration

* fix test data dir

* Add ghcide-test-preprocessor executable and update cabal configuration

* Remove ghcide-test-preprocessor executable and associated flag from cabal configuration

* Update test-suite dependencies to reference the correct executable

* Remove ghcide-test-preprocessor from func-test dependencies

* Add additional test data files to cabal configuration

Author: soulomoon

ghcide-bench/src/Experiments.hs

@@ -857,11 +857,9 @@ getBuildEdgesCount = tryCallTestPlugin GetBuildEdgesCount
 getRebuildsCount :: Session (Either (TResponseError @ClientToServer (Method_CustomMethod "test")) Int)
 getRebuildsCount = tryCallTestPlugin GetRebuildsCount
 
--- Copy&paste from ghcide/test/Development.IDE.Test
 getStoredKeys :: Session [Text]
 getStoredKeys = callTestPlugin GetStoredKeys
 
--- Copy&paste from ghcide/test/Development.IDE.Test
 tryCallTestPlugin :: (A.FromJSON b) => TestRequest -> Session (Either (TResponseError @ClientToServer (Method_CustomMethod "test")) b)
 tryCallTestPlugin cmd = do
     let cm = SMethod_CustomMethod (Proxy @"test")
@@ -873,7 +871,6 @@ tryCallTestPlugin cmd = do
              A.Success a -> Right a
              A.Error e   -> error e
 
--- Copy&paste from ghcide/test/Development.IDE.Test
 callTestPlugin :: (A.FromJSON b) => TestRequest -> Session b
 callTestPlugin cmd = do
     res <- tryCallTestPlugin cmd