NETOBSERV-229 create pre-merge image on PR via action

.github/workflows/push_image.yml

@@ -1,4 +1,4 @@
-name: push to quay.io
+name: Build and push to quay.io
 on:
   push:
     branches: [ main ]

.github/workflows/push_image_pr.yml

@@ -0,0 +1,57 @@
+name: Build and push PR image to quay.io
+on:
+  pull_request_target:
+    types: [labeled]
+
+env:
+  REGISTRY_USER: netobserv+github_ci
+  REGISTRY: quay.io/netobserv
+  IMAGE: flowlogs-pipeline
+
+jobs:
+  push-pr-image:
+    if: ${{ github.event.label.name == 'ok-to-test' }}
+    name: push PR image
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        go: ['1.17']
+    steps:
+      - name: install make
+        run: sudo apt-get install make
+      - name: set up go 1.x
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go }}
+      - name: checkout
+        uses: actions/checkout@v2
+        with:
+          ref: "refs/pull/${{ github.event.number }}/merge"
+      - name: build images
+        run: DOCKER_TAG=temp make build-ci-images
+      - name: podman login to quay.io
+        uses: redhat-actions/podman-login@v1
+        with:
+          username: ${{ env.REGISTRY_USER }}
+          password: ${{ secrets.QUAY_SECRET }}
+          registry: quay.io
+      - name: get short sha
+        id: shortsha
+        run: echo "::set-output name=short_sha::$(git rev-parse --short HEAD)"
+      - name: push to quay.io
+        id: push-to-quay
+        uses: redhat-actions/push-to-registry@v2
+        with:
+          image: ${{ env.IMAGE }}
+          tags: ${{ steps.shortsha.outputs.short_sha }}
+          registry: ${{ env.REGISTRY }}
+      - uses: actions/github-script@v5
+        with:
+          github-token: ${{secrets.GITHUB_TOKEN}}
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: 'New image: ${{ steps.push-to-quay.outputs.registry-paths }}. It will expire after two weeks.'
+            })

.github/workflows/rm-ok-to-test.yaml

@@ -0,0 +1,15 @@
+name: Remove ok-to-test
+on:
+  pull_request_target:
+    types: [synchronize,reopened]
+
+jobs:
+  rm-ok-to-test:
+    if: contains(github.event.pull_request.labels.*.name, 'ok-to-test')
+    runs-on: ubuntu-20.04
+    name: Remove ok-to-test
+    steps:
+      - uses: actions-ecosystem/action-remove-labels@v1
+        with:
+          labels: ok-to-test
+          fail_on_error: true