[CI] Remove win gpu doc gen and trt cuda mini CI pipelines (#28218)
Those pipelines have been replaced by workflows in
https://github.com/microsoft/onnxruntime/pull/28192 and
https://github.com/microsoft/onnxruntime/pull/28194
TODO: remove those pipelines from required pipelines for pull request,
and add "ONNX Runtime Windows GPU Doc Gen CI / Windows GPU Kernel
Documentation Validation" instead.