test: fix disk space error on nightly podman test (knative#2866)

Author: jrangelramos

.github/workflows/test-podman-next.yaml

@@ -12,6 +12,11 @@ jobs:
         os: ["ubuntu-latest"]
     runs-on: ${{ matrix.os }}
     steps:
+      - name: Remove Unnecessary Software
+        run: |
+          sudo rm -rf /usr/share/dotnet || true
+          sudo rm -rf /usr/local/lib/android || true
+          sudo rm -rf /opt/ghc || true
       - name: Install Podman Next (Nightly Build)
         env:
           FEDORA_RELEASE: 41