add hls-brittany-plugin test suite to CI

Author: pepeiborra

.github/workflows/test.yml

@@ -119,3 +119,13 @@ jobs:
         # all functional test cases simultaneously which causes way too many hls
         # instances to be spun up for the poor github actions runner to handle
         run: cabal test wrapper-test --test-options="-j1" || cabal test wrapper-test --test-options="-j1" || cabal test wrapper-test --test-options="-j1"
+
+      - name: Test brittany plugin
+        if: ${{ matrix.test }}
+        env:
+          HLS_TEST_EXE: hls
+          HLS_WRAPPER_TEST_EXE: hls-wrapper
+        # run the tests without parallelism, otherwise tasty will attempt to run
+        # all functional test cases simultaneously which causes way too many hls
+        # instances to be spun up for the poor github actions runner to handle
+        run: cabal test hls-brittany-plugin --test-options="-j1" || cabal test hls-brittany-plugin --test-options="-j1" || cabal test hls-brittany-plugin --test-options="-j1"