CI: python-version not set in drenv and ramenctl tests

We have following CI warnings for drenv and ramenctl tests:

The python-version input is not set. The version of Python currently
in PATH will be used.

Added the python versions supported by ubuntu-22.04 to
resolve the above stated issue.

Fixes: RamenDR#989
Signed-off-by: Shwetha K Acharya <sacharya@redhat.com>

.github/workflows/ci.yaml

@@ -93,12 +93,17 @@ jobs:
   drenv-test:
     name: drenv tests
     runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        python-version: ["3.9", "3.10", "3.11"]
     steps:
       - name: Checkout source
         uses: actions/checkout@v3
 
       - name: Setup python
         uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
 
       - name: Install minikube
         run: |
@@ -145,12 +150,18 @@ jobs:
   ramenctl-test:
     name: ramenctl tests
     runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        python-version: ["3.9", "3.10", "3.11"]
+
     steps:
       - name: Checkout source
         uses: actions/checkout@v3
 
       - name: Setup python
         uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
 
       - name: Install tools
         run: pip install -r requirements.txt