Use public github runner

- Remove docker caching that would only work on persitent runner

.github/workflows/ci.yml

@@ -6,14 +6,15 @@ on:
     merge_group:
     pull_request:
     push:
-      branches:
-        - master
-        - develop
-
+
+# Cancel in-progress jobs except for integration branch
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ !contains(github.ref, 'integration/')}}
 
 jobs:
   build_and_run:
-    runs-on: ubuntu-8
+    runs-on: ubuntu-24.04
 
     steps:
     - name: Checkout
@@ -26,12 +27,5 @@ jobs:
       with:
         driver-opts: network=host
 
-    - name: Cache Docker layers
-      uses: actions/cache@v3
-      with:
-        path: /tmp/.buildx-cache
-        key: ${{ runner.os }}-buildx-${{ hashFiles('Dockerfile') }}
-        restore-keys: ${{ runner.os }}-buildx-
-
     - name:  Startup Nitro testnode
       run: ${{ github.workspace }}/.github/workflows/testnode.bash