fix: install libosmesa for linux runners

Author: moe-ad

.github/workflows/tests.yml

@@ -210,6 +210,13 @@ jobs:
         with:
           DEBUG: true
 
+      - name: "Setup LibOSMesa on Linux runners"
+        if: runner.os == 'Linux'
+        shell: bash
+        run: |
+          sudo apt-get update
+          sudo apt-get install libosmesa6
+
       - name: "Test Docstrings"
         if: (inputs.DOCSTRING == 'true') && !((inputs.test_any == 'true') && (matrix.os == 'ubuntu-latest'))
         uses: ansys/pydpf-actions/[email protected]