wcow: enable integration tests on WS2025

Re-enabling integration tests on WS2025.

WIP: still needs investigation why the tests
take longer on WS2025, upto 2x for some.

Additionally, these 2 are flaky on WS2025:
- [ ] client `testLLBMountPerformance`
- [ ] dockerfile `testCacheMountParallel`

Signed-off-by: Anthony Nandaa <[email protected]>

Author: profnandaa

.github/workflows/test-os.yml

@@ -78,12 +78,12 @@ jobs:
     needs:
       - build
     env:
-      TESTFLAGS: "-v --timeout=60m"
+      TESTFLAGS: "-v --timeout=120m"
       GOTESTSUM_FORMAT: "standard-verbose"
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-2022]
+        os: [windows-2022, windows-2025]
         worker:
           - containerd
         pkg:
@@ -112,6 +112,10 @@ jobs:
             worker: containerd
             pkg: ./...
             skip-integration-tests: 1
+          - os: windows-2025
+            worker: containerd
+            pkg: ./...
+            skip-integration-tests: 1
     steps:
       -
         name: Prepare

client/client_test.go

@@ -11561,6 +11561,8 @@ func testSourcePolicy(t *testing.T, sb integration.Sandbox) {
 }
 
 func testLLBMountPerformance(t *testing.T, sb integration.Sandbox) {
+	// TODO: flaky on WS2025
+	integration.SkipOnPlatform(t, "windows")
 	c, err := New(sb.Context(), sb.Address())
 	require.NoError(t, err)
 	defer c.Close()
@@ -11589,7 +11591,7 @@ func testLLBMountPerformance(t *testing.T, sb integration.Sandbox) {
 	require.NoError(t, err)
 
 	// Windows images take longer time
-	timeout := integration.UnixOrWindows(time.Minute, 3*time.Minute)
+	timeout := integration.UnixOrWindows(time.Minute, 6*time.Minute)
 	timeoutCtx, cancel := context.WithTimeoutCause(sb.Context(), timeout, nil)
 	defer cancel()
 	_, err = c.Solve(timeoutCtx, def, SolveOpt{}, nil)

frontend/dockerfile/dockerfile_mount_test.go

@@ -646,6 +646,8 @@ COPY --from=base /combined.txt /
 
 // moby/buildkit#5566
 func testCacheMountParallel(t *testing.T, sb integration.Sandbox) {
+	// TODO: flaky on WS2025
+	integration.SkipOnPlatform(t, "windows")
 	f := getFrontend(t, sb)
 
 	dockerfile := []byte(integration.UnixOrWindows(