feat(operator): several updates (#806)

- prepare to switch from `master` to `main`
- avoid to run workflow in case is not needed
- add a way to bump the lts via make
- use latest jenkins lts 2.387.1
- add the docker labels
- update base plugins
- fix #797 
- Add more tests with bats
- Update base plugin to latest version
- Temporary revert #807 
- Better nightly job

.github/workflows/auto-tests-e2e.yaml

@@ -0,0 +1,68 @@
+name: Run e2e tests
+on:
+  push:
+    branches:
+      - master
+      - main
+    paths-ignore:
+      - 'docs/**'
+      - 'website/**'
+      - 'assets/**'
+      - 'backup/**'
+      - '*.md'
+  pull_request:
+    types: [opened, synchronize, ready_for_review, reopened]
+    paths-ignore:
+      - 'docs/**'
+      - 'website/**'
+      - 'assets/**'
+      - 'backup/**'
+      - '*.md'
+
+env:
+  MINIKUBE_CPUS_NUMBER: 2
+  MINIKUBE_MEMORY_AMOUNT: 6144
+
+jobs:
+  run-tests:
+    if: github.event.pull_request.draft == false
+    name: Run automated tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v2
+
+      - name: Set up env vars
+        run: |
+          echo "GO111MODULE=on" >> $GITHUB_ENV
+          echo "CHANGE_MINIKUBE_NONE_USER=true" >> $GITHUB_ENV
+          echo "MINIKUBE_WANTUPDATENOTIFICATION=false" >> $GITHUB_ENV
+          echo "MINIKUBE_WANTREPORTERRORPROMPT=false" >> $GITHUB_ENV
+          echo "GO_VERSION=v$(sed -n 's/GO_VERSION=//p' config.base.env)" >> $GITHUB_ENV
+          echo "HELM_VERSION=v$(sed -n 's/HELM_VERSION=//p' config.base.env)" >> $GITHUB_ENV
+          echo "GOPATH=/home/runner/go" >> $GITHUB_ENV
+
+      - name: Prepare go environment
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Ensure Golang runtime dependencies
+        run: make go-dependencies
+
+      - name: Verify code formatting
+        run: make verify
+
+      - name: Prepare environment for e2e
+        run: |
+          sudo apt-get update
+          sudo apt-get install socat
+          sudo mkdir -p $HOME/.kube $HOME/.minikube
+          sudo chown -R $USER $HOME/.kube $HOME/.minikube
+          make minikube-start \
+            MINIKUBE_DRIVER='docker' \
+            MEMORY_AMOUNT=${{ env.MINIKUBE_MEMORY_AMOUNT }} \
+            CPUS_NUMBER=${{ env.MINIKUBE_CPUS_NUMBER }}
+
+      - name: Jenkins Operator - e2e
+        run: make e2e E2E_TEST_ARGS='-ginkgo.v'