update github workflow for testing

.github/workflows/test-and-deploy.yml

@@ -13,10 +13,10 @@ permissions:
   pull-requests: read
 
 jobs:
-  test-windows:
+  test-gpy:
     strategy:
       matrix:
-        os: [windows-latest]
+        os: [windows-latest, ubuntu-latest, macos-latest]
         python: ['3.9', '3.10', '3.11', '3.12']
     runs-on: ${{ matrix.os }}
     steps:
@@ -27,7 +27,6 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
-      
       - name: Install build dependencies
         run: |
           pip install setuptools
@@ -41,33 +40,6 @@ jobs:
           pip install matplotlib
           pip install pytest
 
-      - name: pytest
-        run: |
-          pytest GPy/testing
-
-  test-linux:
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-        python: ['3.9', '3.10', '3.11', '3.12']
-    runs-on: ${{ matrix.os }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup python
-        uses: actions/setup-python@v4
-        with:
-          python-version: ${{ matrix.python }}
-
-      - name: Install build dependencies
-        run: |
-          pip install setuptools
-      
-      - name: Install lib
-        run: |
-          python setup.py develop
-
       - name: Install test dependencies
         run: |
           pip install matplotlib
@@ -77,39 +49,7 @@ jobs:
         run: |
           pytest GPy/testing
 
-  test-macos:
+  build-gpy:
-    strategy:
-      matrix:
-        os: [macos-latest]
-        python: ['3.10', '3.11', '3.12']
-    runs-on: ${{ matrix.os }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup python
-        uses: actions/setup-python@v4
-        with:
-          python-version: ${{ matrix.python }}
-
-      - name: Install build dependencies
-        run: |
-          pip install setuptools
-      
-      - name: Install lib
-        run: |
-          python setup.py develop
-
-      - name: Install test dependencies
-        run: |
-          pip install matplotlib
-          pip install pytest
-
-      - name: pytest
-        run: |
-          pytest GPy/testing
-
-  build-windows:
     if: github.event_name == 'release'
     strategy:
       matrix:
@@ -226,7 +166,7 @@ jobs:
 
   deploy:
     runs-on: ubuntu-latest
-    needs: [test-windows, test-linux, test-macos, build-linux, build-windows, build-macos]
+    needs: [test-gpy, build-linux, build-windows, build-macos]
     if: github.event_name == 'release'
     steps:
       - name: Checkout