chore: add Aspect Workflows warming workflows to GitHub Actions (#459)

.github/workflows/warming.yaml

@@ -0,0 +1,29 @@
+name: CI Warming
+
+# Periodically create archives that have Bazel external folders to restore on new instances, making
+# those instances more "warm".
+on:
+  # Allow trigger via UI
+  workflow_dispatch:
+  schedule:
+    # Every 4 hours preceeding working hours
+    # M-F 8:05, 12:05, 16:05 PDT
+    - cron: '5 15,19,23 * * 1-5'
+
+jobs:
+  warming-archive:
+    # Note: warming should run an a dedicated runner pool / queue typically named "aspect-default-warming".
+    runs-on: [self-hosted, aspect-workflows, aspect-aspect-cli-warming]
+    steps:
+      - name: Configure environment
+        run: configure_workflows_env
+      - uses: actions/checkout@v3
+      - name: Agent health checks
+        run: agent_health_check
+      - name: Create warming archive for .
+        uses: ./rosetta/gh-actions
+        with:
+          task: warming
+          workspace: .
+      - name: Archive warming tars
+        run: warming_archive