[ORT+DML] Validate DML EP header files in ORT+DML NuGet pacakge (#13359)

### Description
Today, ORT+DML NuGet package does not validate the existence of the DML
EP header files and DML dlls. This change extends the existing python
script to verify the existence of DML EP related headers.
For DML as a dependent package, we will be using another task and it
will a separate PR.

### Motivation and Context
- Why is this change required? What problem does it solve?
Pro-actively verifies the ORT+DML release candidate rather than a
customer raise an issue after it gets published to NuGet.
- If it fixes an open issue, please link to the issue here. N/A

Co-authored-by: Sumit Agarwal <sumitagarwal@microsoft.com>

tools/nuget/validate_package.py

@@ -28,6 +28,13 @@ gpu_related_header_files = [
     "onnxruntime_cxx_api.h",
     "onnxruntime_cxx_inline.h",
 ]
+dmlep_related_header_files = [
+    "cpu_provider_factory.h",
+    "onnxruntime_c_api.h",
+    "onnxruntime_cxx_api.h",
+    "onnxruntime_cxx_inline.h",
+    "dml_provider_factory.h",
+]
 
 
 def parse_arguments():
@@ -58,12 +65,26 @@ def check_exists(path):
     return os.path.exists(path)
 
 
+def remove_residual_files(path):
+    if check_exists(path):
+        os.remove(path)
+
+
 def is_windows():
     return sys.platform.startswith("win")
 
 
+def check_if_headers_are_present(header_files, header_folder, file_list_in_package, platform):
+    for header in header_files:
+        path = header_folder + "/" + header
+        print("Checking path: " + path)
+        if path not in file_list_in_package:
+            print(header + " not found for " + platform)
+            raise Exception(header + " not found for " + platform)
+
+
 def check_if_dlls_are_present(
-    package_type, is_windows_ai_package, is_gpu_package, platforms_supported, zip_file, package_path
+    package_type, is_windows_ai_package, is_gpu_package, is_dml_package, platforms_supported, zip_file, package_path
 ):
     platforms = platforms_supported.strip().split(",")
     if package_type == "tarball":
@@ -97,12 +118,10 @@ def check_if_dlls_are_present(
                     if path not in file_list_in_package:
                         print(dll + " not found for " + platform)
                         raise Exception(dll + " not found for " + platform)
-                for header in gpu_related_header_files:
-                    path = header_folder + "/" + header
-                    print("Checking path: " + path)
-                    if path not in file_list_in_package:
-                        print(header + " not found for " + platform)
-                        raise Exception(header + " not found for " + platform)
+                check_if_headers_are_present(gpu_related_header_files, header_folder, file_list_in_package, platform)
+
+            if is_dml_package:
+                check_if_headers_are_present(dmlep_related_header_files, header_folder, file_list_in_package, platform)
 
         elif platform.startswith("linux"):
             if package_type == "nuget":
@@ -179,8 +198,15 @@ def validate_tarball(args):
 
     is_windows_ai_package = False
     zip_file = None
+    is_dml_package = False
     check_if_dlls_are_present(
-        args.package_type, is_windows_ai_package, is_gpu_package, args.platforms_supported, zip_file, package_folder
+        args.package_type,
+        is_windows_ai_package,
+        is_gpu_package,
+        is_dml_package,
+        args.platforms_supported,
+        zip_file,
+        package_folder,
     )
 
 
@@ -200,9 +226,16 @@ def validate_zip(args):
     package_folder = re.search("(.*)[.].*", package_name).group(1)
 
     is_windows_ai_package = False
+    is_dml_package = False
     zip_file = zipfile.ZipFile(package_name)
     check_if_dlls_are_present(
-        args.package_type, is_windows_ai_package, is_gpu_package, args.platforms_supported, zip_file, package_folder
+        args.package_type,
+        is_windows_ai_package,
+        is_gpu_package,
+        is_dml_package,
+        args.platforms_supported,
+        zip_file,
+        package_folder,
     )
 
 
@@ -221,6 +254,11 @@ def validate_nuget(args):
     else:
         is_gpu_package = False
 
+    if "directml" in nuget_file_name.lower():
+        is_dml_package = True
+    else:
+        is_dml_package = False
+
     exit_code = 0
 
     nupkg_copy_name = "NugetCopy" + ".nupkg"
@@ -228,11 +266,8 @@ def validate_nuget(args):
     zip_file = None
 
     # Remove any residual files
-    if check_exists(nupkg_copy_name):
-        os.remove(nupkg_copy_name)
-
-    if check_exists(zip_copy_name):
-        os.remove(zip_copy_name)
+    remove_residual_files(nupkg_copy_name)
+    remove_residual_files(zip_copy_name)
 
     # Do all validations here
     try:
@@ -251,7 +286,13 @@ def validate_nuget(args):
         print("Checking if the Nuget contains relevant dlls")
         is_windows_ai_package = os.path.basename(full_nuget_path).startswith("Microsoft.AI.MachineLearning")
         check_if_dlls_are_present(
-            args.package_type, is_windows_ai_package, is_gpu_package, args.platforms_supported, zip_file, None
+            args.package_type,
+            is_windows_ai_package,
+            is_gpu_package,
+            is_dml_package,
+            args.platforms_supported,
+            zip_file,
+            None,
         )
 
         verify_nuget_signing = args.verify_nuget_signing.lower()