ci: run the Windows tests on a runner with KVM (#1369)

Run the Windows tests on `ubuntu-latest-kvm` as a PR job, with the installed Windows cached, minutes instead of ~1h40m. Aligned with https://gitea.com/gitea/gitea-mcp/pulls/321 and https://gitea.com/gitea/cli/pulls/79.

Co-authored-by: silverwind <[email protected]>
Reviewed-on: https://gitea.com/gitea/runner/pulls/1369
Reviewed-by: silverwind <[email protected]>
Co-authored-by: Zettat123 <[email protected]>

.gitea/workflows/test-windows.yml

@@ -1,21 +0,0 @@
-name: windows
-on:
-  schedule:
-    - cron: '0 3 * * 1'
-  workflow_dispatch:
-
-env:
-  DOCKER_CONFIG: /tmp/docker-noauth # see test.yml
-
-jobs:
-  test:
-    name: test on windows
-    runs-on: ubuntu-latest
-    timeout-minutes: 180
-    steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
-      - uses: ./.gitea/actions/go-setup
-      - name: prepare anonymous docker config
-        run: mkdir -p "$DOCKER_CONFIG" && echo '{}' > "$DOCKER_CONFIG/config.json"
-      - name: test on windows
-        run: make test-windows

.gitea/workflows/test.yml

@@ -57,6 +57,29 @@ jobs:
           make coverage-report
           cat .tmp/coverage.md >> "$GITHUB_STEP_SUMMARY"
 
+  windows:
+    name: test on windows
+    runs-on: ubuntu-latest-kvm
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: ./.gitea/actions/go-setup
+      - name: prepare anonymous docker config
+        run: mkdir -p "$DOCKER_CONFIG" && echo '{}' > "$DOCKER_CONFIG/config.json"
+      - uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
+        with:
+          path: ~/.cache/windows-vm
+          key: windows-vm
+      - name: test on windows
+        id: test-windows
+        run: WINDOWS_TEST_CACHE="$HOME/.cache/windows-vm" make test-windows
+        env:
+          WINDOWS_TEST_TIMEOUT: 45
+      - if: always() && steps.test-windows.outputs.save-cache == 'true'
+        uses: actions/cache/save@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
+        with:
+          path: ~/.cache/windows-vm
+          key: windows-vm
+
   e2e:
     name: gitea compatibility (${{ matrix.gitea_image }})
     runs-on: ubuntu-latest