Add Reusable Workflow test

ql/lib/test/.github/workflows/calling_workflow.yml

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+on: push
+
+jobs:
+  call-workflow-1-in-local-repo:
+    uses: octo-org/this-repo/.github/workflows/reusable_workflow.yml@172239021f7ba04fe7327647b213799853a9eb89
+    with:
+      config-path: ${{ github.event.pull_request.head.ref }}
+    secrets: inherit
+  call-workflow-2-in-local-repo:
+    uses: ./.github/workflows/reusable_workflow.yml
+    with:
+      config-path: ${{ github.event.pull_request.head.ref }}
+    secrets: inherit
+  call-workflow-in-another-repo:
+    uses: octo-org/another-repo/.github/workflows/workflow.yml@v1
+    with:
+      config-path: ${{ github.event.pull_request.head.ref }}
+    secrets: inherit

ql/lib/test/.github/workflows/reusable_workflow.yml

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+name: Reusable workflow example
+
+on:
+  workflow_call:
+    inputs:
+      config-path:
+        required: true
+        type: string
+    secrets:
+      token:
+        required: true
+
+jobs:
+  triage:
+    runs-on: ubuntu-latest
+    steps:
+      - id: sink
+        run: echo ${{ inputs.config-path }}