[Build] Fix nuget pipelines to pass IsReleaseBuild to validate-package#27387

tianleiwu merged 1 commit intomainmicrosoft/onnxruntime:mainfrom

tlwu/20260218/is_release_build_in_nuget_pipelinesmicrosoft/onnxruntime:tlwu/20260218/is_release_build_in_nuget_pipelinesCopy head branch name to clipboard