Add e2e tests for winograd (#11428)

This patch adds e2e tests to validate the
accuracy of the winograd convolution.
diff --git a/tests/e2e/linalg/BUILD b/tests/e2e/linalg/BUILD
index a7cf366..f269320 100644
--- a/tests/e2e/linalg/BUILD
+++ b/tests/e2e/linalg/BUILD
@@ -33,6 +33,16 @@
     target_backend = "llvm-cpu",
 )
 
+iree_check_single_backend_test_suite(
+    name = "check_winograd_llvm-cpu_local-task",
+    srcs = LLVM_SRCS,
+    compiler_flags = [
+        "--iree-flow-enable-conv-winograd-transform",
+    ],
+    driver = "local-task",
+    target_backend = "llvm-cpu",
+)
+
 VMVX_SRCS = enforce_glob(
     [
         "conv2d.mlir",
@@ -65,11 +75,23 @@
     target_backend = "vulkan-spirv",
 )
 
+iree_check_single_backend_test_suite(
+    name = "check_winograd_vulkan-spirv_vulkan",
+    srcs = VULKAN_SRCS,
+    compiler_flags = [
+        "--iree-flow-enable-conv-winograd-transform",
+    ],
+    driver = "local-task",
+    target_backend = "llvm-cpu",
+)
+
 test_suite(
     name = "check",
     tests = [
         ":check_llvm-cpu_local-task",
         ":check_vmvx_local-task",
         ":check_vulkan-spirv_vulkan",
+        ":check_winograd_llvm-cpu_local-task",
+        ":check_winograd_vulkan-spirv_vulkan",
     ],
 )
diff --git a/tests/e2e/linalg/CMakeLists.txt b/tests/e2e/linalg/CMakeLists.txt
index c946a5f..8e93b79 100644
--- a/tests/e2e/linalg/CMakeLists.txt
+++ b/tests/e2e/linalg/CMakeLists.txt
@@ -25,6 +25,19 @@
 
 iree_check_single_backend_test_suite(
   NAME
+    check_winograd_llvm-cpu_local-task
+  SRCS
+    "conv2d.mlir"
+  TARGET_BACKEND
+    "llvm-cpu"
+  DRIVER
+    "local-task"
+  COMPILER_FLAGS
+    "--iree-flow-enable-conv-winograd-transform"
+)
+
+iree_check_single_backend_test_suite(
+  NAME
     check_vmvx_local-task
   SRCS
     "conv2d.mlir"
@@ -49,4 +62,17 @@
     "--iree-input-type=none"
 )
 
+iree_check_single_backend_test_suite(
+  NAME
+    check_winograd_vulkan-spirv_vulkan
+  SRCS
+    "conv2d.mlir"
+  TARGET_BACKEND
+    "llvm-cpu"
+  DRIVER
+    "local-task"
+  COMPILER_FLAGS
+    "--iree-flow-enable-conv-winograd-transform"
+)
+
 ### BAZEL_TO_CMAKE_PRESERVES_ALL_CONTENT_BELOW_THIS_LINE ###