CI: install Qt with brew on macOS

GitHub macos-latest runner seems to have switched to arm64
by default but jurplel/install-qt-action@v3 just provides
x86_64 binaries

Author: HuguesDelorme

.github/workflows/ci_macos.yml

@@ -11,18 +11,13 @@ jobs:
           uses: actions/checkout@v2
 
         - name: Install Qt
-          uses: jurplel/install-qt-action@v3
-          with:
-              cache: true
-              cache-key-prefix: QtCache
+          run: brew install qt@5
 
         - name: Install OpenCascade
-          run: |
-              brew install opencascade
+          run: brew install opencascade
 
         - name: Install Assimp
-          run: |
-              brew install assimp
+          run: brew install assimp
 
         - name: Get count of CPU cores
           uses: SimenB/github-actions-cpu-cores@v1
@@ -35,7 +30,8 @@ jobs:
               cmake --version
               cmake .. \
                     -DMayo_BuildTests=ON \
-                    -DMayo_BuildPluginAssimp=ON
+                    -DMayo_BuildPluginAssimp=ON \
+                    -DQT_DIR=$(brew --prefix qt5)/lib/cmake/Qt5
               cmake --build . \
                     --config Release \
                     --parallel ${{steps.cpu-cores.outputs.count}}