fix: disable runSubset

See haskell#3458 (comment) for discussion.

It forces runSubset for editor which does not support the file change
notification project wise (helix/neovim/...).

The good:
- Way faster updates

The ugly:
- If you change a file by an external process, HLS will be lost. Open
  this file in your editor and manually trigger some changes so HLS will
  be on sync again.

Author: guibou

ghcide/src/Development/IDE/Main.hs

@@ -329,7 +329,7 @@ defaultMain recorder Arguments{..} = withHeapStats (cmapWithPrio LogHeapStats re
                   let def_options = argsIdeOptions config sessionLoader
 
                   -- disable runSubset if the client doesn't support watched files
-                  runSubset <- (optRunSubset def_options &&) <$> LSP.runLspT env isWatchSupported
+                  runSubset <- pure True
                   log Debug $ LogShouldRunSubset runSubset
 
                   let options = def_options