Add Workflow for running critest with Hyper-V Containers on Windows.

Signed-off-by: Nashwan Azhari <nazhari@cloudbasesolutions.com>

.github/workflows/windows-hyperv-periodic-trigger.yml

@@ -0,0 +1,25 @@
+# Workflow intended to periodically run the Windows Hyper-V Integration test workflow.
+
+name: Windows Hyper-V Periodic Tests
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 1 * * *"
+
+jobs:
+
+  triggerWinIntegration:
+    if: github.repository == 'containerd/containerd'
+    # NOTE(aznashwan, 11/24/21): GitHub actions do not currently support referencing
+    # or evaluating any kind of variables in the `uses` clause, but this will
+    # ideally be added in the future in which case the hardcoded reference to the
+    # upstream containerd repository should be replaced with the following to
+    # potentially allow contributors to enable periodic Windows tests on forks as well:
+    # uses: "${{ github.repository }}/.github/workflows/windows-hyperv-periodic.yml@${{ github.ref_name }}"
+    uses: containerd/containerd/.github/workflows/windows-hyperv-periodic.yml@main
+    secrets:
+      AZURE_SUB_ID: "${{ secrets.AZURE_SUB_ID }}"
+      AZURE_CREDS: "${{ secrets.AZURE_CREDS }}"
+      GCP_SERVICE_ACCOUNT: "${{ secrets.GCP_SERVICE_ACCOUNT }}"
+      GCP_WORKLOAD_IDENTITY_PROVIDER: "${{ secrets.GCP_WORKLOAD_IDENTITY_PROVIDER }}"