chore(lib): Update cert_handler library to v1

.github/workflows/integrate.yaml

@@ -54,6 +54,14 @@ jobs:
           - integration-tls-provider
           - integration-tls-secret
     steps:
+      # Ideally we'd use self-hosted runners, but this effort is still not stable
+      # This action will remove unused software (dotnet, haskell, android libs, codeql,
+      # and docker images) from the GH runner.
+      # This leaves ~45GB free as of 2024-04-10, but this amount has varied as GH changed their
+      # runners
+      - name: Maximise GH runner space
+        uses: jlumbroso/[email protected]
+
       - name: Check out repo
         uses: actions/checkout@v4
 
@@ -71,7 +79,7 @@ jobs:
           juju add-model test-istio
           tox -e ${{ matrix.integration-types }} -- --model test-istio
         timeout-minutes: 80
-  
+
       - name: Setup Debug Artifact Collection
         run: mkdir tmp
         if: failure()