Ignore nvc switch errors

Author: EmilyBourne

.github/workflows/cuda.yml

@@ -62,8 +62,10 @@ jobs:
         uses: ./.github/actions/linux_install
       - name: Install Pyccel with tests
         run: |
-            python -m pip install --upgrade pip
-            python -m pip install .[test]
+          # Ignore nvc switch errors
+          export CFLAGS=-noswitcherror
+          python -m pip install --upgrade pip
+          python -m pip install .[test]
         shell: bash
       - name: Coverage install
         uses: ./.github/actions/coverage_install