added apptainer setup actions

.github/workflows/unit-tests.yml

@@ -46,6 +46,9 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Setup apptainer
+        uses: eWaterCycle/setup-apptainer@v2.0.0
+
       - name: Setup MeSS environment
         uses: conda-incubator/setup-miniconda@v3
         with:
@@ -54,18 +57,6 @@ jobs:
           python-version: ${{ matrix.python-version }}
           auto-update-conda: true
 
-      - name: Setup apt dependencies
-        run: |
-          sudo add-apt-repository -y ppa:apptainer/ppa
-          sudo apt-get update
-          sudo apt install -y squashfuse fuse2fs gocryptfs apptainer
-
-      - name: Disable apparmor namespace restrictions for apptainer
-        run: |
-          sudo sh -c 'echo kernel.apparmor_restrict_unprivileged_userns=0 \
-              >/etc/sysctl.d/90-disable-userns-restrictions.conf'
-          sudo sysctl -p /etc/sysctl.d/90-disable-userns-restrictions.conf
-
       - name: Install MeSS and pytest-cov
         run: |
           pip install -e .