Use docker's native github actions caching

.github/workflows/ci.yaml

@@ -3,7 +3,7 @@ name: CI
 on:
   push:
     branches:
-      - main
+      #- main
   pull_request:
   merge_group:
     branches:
@@ -22,13 +22,6 @@ jobs:
       - name: set up docker buildx
         run: docker buildx create --name builder --use
 
-      - name: cache docker layers
-        uses: actions/cache@v2
-        with:
-          path: /tmp/.buildx-cache
-          key: docker-buildx-rs-${{ github.sha }}
-          restore-keys: docker-buildx-rs-
-
       - name: Rust Cache
         uses: Swatinem/rust-cache@v2
         with:
@@ -39,6 +32,18 @@ jobs:
       - name: Register rust problem matcher
         run: echo "::add-matcher::.github/problem-matchers/rust.json"
 
+      - name: Build and cache
+        uses: docker/build-push-action@v6
+        env:
+          DOCKER_BUILD_SUMMARY: false
+          DOCKER_BUILD_RECORD_UPLOAD: false
+        with:
+          tags: sudo-test-rs
+          load: true
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          file: test-framework/sudo-test/src/ours.Dockerfile
+
       - name: Run all E2E tests
         working-directory: test-framework
         run: cargo test -p e2e-tests