add workflow for testing upgrade from latest release to latest changes

.github/workflows/upgrade-testing.yml

@@ -0,0 +1,52 @@
+name: upgrade-testing
+"on":
+  push:
+    branches:
+      - develop
+    paths-ignore:
+      - 'docs/**'
+      - '*.md'
+  pull_request:
+    types: [opened, reopened, synchronize]
+    paths-ignore:
+      - 'docs/**'
+      - '*.md'
+
+jobs:
+  test-all:
+    name: Upgrade Testing
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Go 1.x
+        uses: actions/setup-go@v1
+        with:
+          go-version: "1.16"
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v1
+        with:
+          path: src/github.com/${{ github.repository }}
+      - name: Install Carvel Tools
+        uses: vmware-tanzu/carvel-setup-action@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          only: ytt, kapp, kbld
+          ytt: v0.34.0
+          kapp: v0.37.0
+          kbld: v0.30.0
+      - name: Run Upgrade Test
+        run: |
+          set -e -x
+          export GOPATH=$(echo `pwd`/../../../../)
+
+          mkdir /tmp/bin
+          export PATH=/tmp/bin:$PATH
+
+          wget -O- https://github.com/kubernetes/minikube/releases/download/v1.21.0/minikube-linux-amd64 > /tmp/bin/minikube
+          echo "5d423a00a24fdfbb95627a3fadbf58540fc4463be2338619257c529f93cf061b  /tmp/bin/minikube" | sha256sum -c -
+          chmod +x /tmp/bin/minikube
+          minikube start --driver=docker
+          eval $(minikube docker-env --shell=bash)
+
+          kapp deploy -a kc -f https://github.com/vmware-tanzu/carvel-kapp-controller/releases/latest/download/release.yml -y
+
+          ./hack/deploy.sh