chore: add wait build reusable workflow

.github/workflows/wait-build-reusable.yml

@@ -0,0 +1,62 @@
+name: Backend-switching-tests-gardener (reusable)
+
+on:
+  workflow_call:
+    inputs:
+      repository:
+        description: Full name of repository (<owner>/<name>).
+        required: true
+        type: string
+      git_ref:
+        description: Git reference against which the check will be retrieved. Could be commit SHA, tag or branch name.
+        required: true
+        type: string
+      git_check_run_name:
+        description: Name of the Git check to wait for.
+        required: true
+        type: string
+      interval:
+        description: Interval (seconds) for polling the status.
+        required: false
+        default: 60
+        type: number
+      timeout:
+        description: Timeout (seconds) to wait for in total.
+        required: false
+        default: 600
+        type: number
+
+jobs:
+  wait-for-build-job:
+    name: Wait for build job
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout eventing-tools
+        uses: actions/checkout@v4
+        with:
+          repository: 'kyma-project/eventing-tools'
+          path: 'kyma-project/eventing-tools'
+          ref: main
+          sparse-checkout: 'scripts/wait-for-commit-check'
+
+      - name: Setup python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.10'
+          cache: 'pip'
+
+      - name: Install requirements
+        run: |
+          pip install -r $GITHUB_WORKSPACE/kyma-project/eventing-tools/scripts/wait-for-commit-check/requirements.txt
+
+      - name: Wait for build job
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          REPOSITORY_FULL_NAME: ${{ inputs.repository }}
+          GIT_REF: "${{ inputs.git_ref }}"
+          GIT_CHECK_RUN_NAME: "${{ inputs.git_check_run_name }}"
+          INTERVAL: ${{ inputs.interval }}
+          TIMEOUT: ${{ inputs.timeout }}
+        run: |
+          python $GITHUB_WORKSPACE/kyma-project/eventing-tools/scripts/wait-for-commit-check/run.py