ci: Try using haskell-actions/setup

This would allow us to use a single CI infrastructure for all platforms.

.github/workflows/validate.yml

@@ -0,0 +1,19 @@
+on: [push]
+name: build
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        ghc: ['9.2.3', '9.4.5', '9.6.6', '9.8.4', '9.10.1']
+        cabal: ['3.14.1.1']
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+    name: "hsc2hs validation: ${{ matrix.os }} - ${{ matrix.ghc }}"
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Haskell
+        uses: haskell-actions/setup@v2
+        with:
+          ghc-version: ${{ matrix.ghc }}
+          cabal-version: ${{ matrix.cabal }}
+      - run: cabal test