Add configurable input options to Python tox unit testing workflow

.github/workflows/python_unit_testing_tox_main.yml

@@ -1,27 +1,26 @@
-name: Unit Testing
+name: Python Unit Testing via Tox
 
 on:
   workflow_call:
-
+    inputs:
+      python:
+        required: false
+        type: string
+        default: "3.10"
+      platform:
+        required: false
+        type: string
+        default: "ubuntu-latest"
 
 jobs:
   test:
-    strategy:
-      matrix:
-        python:
-        - "3.9"  # oldest Python supported by PSF
-        - "3.11"  # newest Python that is stable
-        platform:
-        - ubuntu-latest
-        # - macos-latest
-        - windows-latest
-    runs-on: ${{ matrix.platform }}
+    runs-on: ${{ inputs.platform }}
     steps:
       - uses: actions/checkout@v3
 
       - uses: actions/setup-python@v4
         with:
-          python-version: ${{ matrix.python }}
+          python-version: ${{ inputs.python }}
 
       - name: Install dependencies
         run: |