Fix some errors for testnet-20.04 build

Author: iKapitonau

.github/workflows/release.yaml

@@ -131,6 +131,12 @@ jobs:
       REGISTRY: ghcr.io
       IMAGE_NAME: scrtlabs/secret-network-node
     steps:
+      - name: Clean up space (workaround)
+        run: |
+          sudo rm -rf /usr/share/dotnet
+          sudo rm -rf /opt/ghc
+          sudo rm -rf "/usr/local/share/boost"
+          sudo rm -rf "$AGENT_TOOLSDIRECTORY"
       - uses: actions/checkout@v4
         with:
           submodules: recursive