Disable dml stage in windows GPU pipeline temporarily. (#18034)

### Description
<!-- Describe your changes. -->



### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->

Author: mszhanyi

tools/ci_build/github/azure-pipelines/win-gpu-ci-pipeline.yml

@@ -70,23 +70,6 @@ stages:
         MachinePool: onnxruntime-Win2022-GPU-T4
         isTraining: true
 
-- stage: dml
-  dependsOn: []
-  jobs:
-    - template: templates/jobs/win-ci-vs-2022-job.yml
-      parameters:
-        BuildConfig: 'RelWithDebInfo'
-        EnvSetupScript: setup_env.bat
-        buildArch: x64
-        additionalBuildFlags: --enable_pybind --use_dml --enable_wcos  --use_winml
-        msbuildPlatform: x64
-        isX86: false
-        job_name_suffix: x64_RelWithDebInfo
-        RunOnnxRuntimeTests: ${{ parameters.RunOnnxRuntimeTests }}
-        ORT_EP_NAME: DML
-        WITH_CACHE: true
-        MachinePool: onnxruntime-Win2022-GPU-dml-A10
-
 - stage: kernelDocumentation
   dependsOn: []
   jobs: