fix(ci): remove a bunch of rubbish from the runner to free up disk space

.github/workflows/cache.yml

@@ -9,8 +9,28 @@ jobs:
     - uses: cachix/install-nix-action@v20
       with:
         nix_path: nixpkgs=channel:nixos-unstable
+    # yoinked from https://github.com/ifd3f/infra/blob/main/.github/workflows/check-targets.yml
+    - name: Remove unneccessary packages
+        run: 'echo "=== Before pruning ==="
+
+          df -h
+
+          sudo rm -rf /usr/bin/buildah /usr/bin/containerd* /usr/bin/ctr /usr/bin/docker*
+          /usr/bin/gh /usr/bin/git /usr/bin/gpg /usr/bin/grub* /usr/bin/mono-sgen
+          /usr/bin/myisam* /usr/bin/mysql* /usr/bin/openssl /usr/bin/pedump /usr/bin/php*
+          /usr/bin/podman /usr/bin/python3.10 /usr/bin/shellcheck /usr/bin/skopeo
+          /usr/bin/snap /usr/bin/tcpdump /usr/bin/tmux /usr/bin/x86_64-linux-gnu-*
+          /usr/bin/yq /opt /usr/local /usr/share /var/lib /var/log || true
+
+          echo
+
+          echo "=== After pruning ==="
+
+          df -h
+          '
     - uses: cachix/cachix-action@v12
       with:
         name: ashhhleyyy
         authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
     - run: GC_DONT_GC=1 nix build --show-trace --log-lines 10000 --fallback '.#nixosConfigurations.alex.config.system.build.toplevel'
+    - run: df -h