Test: reduce memory usage in coverage build

Author: vlad-perevezentsev

.github/workflows/generate_coverage.yaml

@@ -117,7 +117,31 @@ jobs:
           mamba info
           mamba list
 
+      - name: Free Disk Space (Ubuntu)
+        uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be # v1.3.1
+        with:
+          docker-images: false
+
+      - name: Show memory before swap
+        run: |
+          free -h
+          swapon --show || true
+
+      - name: Create swap
+        run: |
+          sudo fallocate -l 10G /swapfile
+          sudo chmod 600 /swapfile
+          sudo mkswap /swapfile
+          sudo swapon /swapfile
+
+      - name: Show memory after swap
+        run: |
+          free -h
+          swapon --show
+
       - name: Build dpnp with coverage
+        env:
+          CMAKE_BUILD_PARALLEL_LEVEL: 1
         id: build_coverage
         uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3.0.2
         with:
@@ -129,8 +153,10 @@ jobs:
             . $CONDA/etc/profile.d/conda.sh
             conda activate coverage
             [ -f /opt/intel/oneapi/setvars.sh ] && source /opt/intel/oneapi/setvars.sh
+            free -h
             git clean -fxd
             python scripts/gen_coverage.py
+            free -h
 
       - name: Total number of coverage attempts
         run: |