ci: replace stylua action with our own lint target

This will prevent situations where the linting works on CI but not
locally, at the cost of increased CI time.

Also manually ignore `runtime/vim/lua/re.lua`, as the .styluaignore
isn't respected when specifying a file instead of a directory.

.github/workflows/test.yml

@@ -42,6 +42,13 @@ jobs:
       - name: Install dependencies
         run: ./.github/scripts/install_deps.sh lua-check
 
+      - name: Set up Homebrew
+        id: homebrew
+        uses: Homebrew/actions/setup-homebrew@master
+
+      - run: |
+          brew install stylua
+
       - name: Cache uncrustify
         id: cache-uncrustify
         uses: actions/cache@v3
@@ -84,12 +91,8 @@ jobs:
         run: echo "status=${{ job.status }}" >> $GITHUB_OUTPUT
 
       - if: success() || failure() && steps.abort_job.outputs.status == 'success'
-        name: lintstylua
-        uses: JohnnyMorganz/stylua-action@v2
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          version: latest
-          args: --check runtime/
+        name: stylua
+        run: cmake --build build --target lintlua-stylua
 
       - if: success() || failure() && steps.abort_job.outputs.status == 'success'
         name: luacheck

CMakeLists.txt

@@ -236,6 +236,8 @@ add_glob_target(
   FLAGS --color=always --check
   GLOB_DIRS runtime/
   GLOB_PAT *.lua
+  EXCLUDE
+    /runtime/lua/vim/re.lua
   TOUCH_STRATEGY SINGLE)
 
 add_custom_target(lintlua)