Fix failing debugger tests on GHA (microsoft#11573)

* Fix failing debugger tests on GHA

* Install wheels first

* Remove wheel from requirements

Author: Kartik Raj

.github/workflows/ci.yml

@@ -278,6 +278,14 @@ jobs:
           python -m pip install --upgrade -r ./build/ipython-test-requirements.txt
         if: matrix.test-suite == 'python-unit'
 
+      - name: Install Debugpy wheels
+        run: |
+          python -m pip install wheel
+          python -m pip --disable-pip-version-check install -r build/debugger-install-requirements.txt
+          python ./pythonFiles/install_debugpy.py
+        shell: bash
+        if: matrix.test-suite == 'debugger' && matrix.python == 3.8
+
       - name: Install functional test requirements
         run: |
           python -m pip install numpy