Run ghcide-tests if the hls-test-utils changes

Ghcide test infrastructure was refactored to depend on `hls-test-utils`.

Author: fendor

.github/workflows/test.yml

@@ -48,8 +48,7 @@ jobs:
         uses: fkirc/[email protected]
         with:
           cancel_others: false
-          paths_ignore: '[ "hls-test-utils/**"
-                         , "plugins/**"
+          paths_ignore: '[ "plugins/**"
                          , "src/**"
                          , "exe/**"
                          , "test/**"